Is it normal to feel this toward my first cousin removed?

Just recently, I had a trip with my father and mother to our hometown which is a very long ride from where we reside. The reason for this quick trip is a family reunion; my two aunts (my father's sisters) came home too from another country. I just arrived at my aunt's place with my 30ish cousin then from a nearby store, I saw him as I was entering the gates and he was just there outside the door sitting with my uncles and aunts,and my father was there too,and this first cousin once removed stared at me. I knew from that moment on, it was trouble. Honestly,I was hesitant to approach the group. I am this kind of girl who gets disturbed when somebody looks at me, let alone, stares at me.But then I thought,“oh well,he’s just a kin,”so eventually,I approached them. It happened that our other relatives tease me for the fact that I look like his mother whom he never gets to see for many years because of her work in another country,leaving him in the care of his grandmother,my aunt.That day,I thought he must be mesmerized for seeing me because I look much like his mother he misses.By the way,it’s been 8 years since we last met, and he was still a kid way back then. Now, I must admit, he doesn’t look like a kid anymore and he’s even taller than me. We got along well after a quick introduction, then I always felt he’s staring at me so I threw him a “what” look everytime. He always took pictures of me which I didn’t like the most, so I covered my face with my hand or took a photo of him too still covering my face with the phone. Wherever I was or went, he was there too. By the way, our gathering was not just a one-day affair, it went on for days. One afternoon, he asked me to stroll down the boulevard and watch the sea,I said, I can’t.But before that,it was only him and me talking outside the house, the elders were inside the house.Some children would disturb us and he shooed them away irritatingly which brought me laughing mentally. Speaking of children, they started taking notice of how close we were, this particular young girl would tease me and him being a couple but everytime, I only displayed a poker face, while he pretended to be preoccupied with his phone or that he didn’t hear it. Those times were really awkward. Back to him asking me to go for a walk, in the end,he won. I told my mother first to go for a walk with him. So I found him outside with his phone again. I called his attention impatiently and told him to go for a walk. The table was turned already, he pretended to be surprised. That was just part of his pretension, I knew it. My uncle’s wife just stepped out of the house too and witnessed it. She laughed openly and teased him to be playing an act just to show I was the one who asked him first not him.
So we sat down on the bench which overlooks the sea, and we had a serious talk. Thankfully, he didn’t talk about his huge like towards me but he only talked about his mother. As time went on, I felt him getting attached to me, even when it’s time to go home, I didn’t stay in that place at nights, I stayed in my other aunt’s place for some nights with my parents, he seemed like he wanted me to stay, he just couldn’t say it but I could tell it on his face.
Before we went home to my present address, two days before we decided to drop by in my aunt’s house (his grandma) which is also one hour away from the city. But the night before that, we exchanged text messages since he asked for my number and there, he confessed his feelings to me, that he likes me but I didn’t believe him, I told him so. But days before that, he chatted me on facebook asking for my number which had my eyebrows to shoot up. Didn’t he ask for my number personally? Then he confessed, he deleted it from his phone because he was angry at me and likes me. I don’t know if he’s angry that he likes me or what? I didn’t believe him, because he used to confess his feelings and told me later on, it was just a joke, which had me sigh in relief in the end. That day during our visit to his house, I met him again,he came home during lunch from school and I was sitting on the couch, reading a book, pretended to be occupied with my reading and he approached by my side and asked me to move aside, and sat next to me. I looked at him irritatingly and he just laughed at me asking me what happened to me.That day,I distanced from him,I didn’t know why.Though we were in the same house when it’s almost time to go back to the city and leave them, he sent messages to me (not really a message, but some emoticons I couldn't even understand), but one message I couldn’t understand, I looked at him since he sat a few meters from where I sat and asked him “what”. He answered it’s a wrong sent so I shrugged it off. When it’s really time to say goodbye to my aunt (his grandmother who lives 1 hour outside the city) and we don’t know yet when we’ll visit our hometown again, I hugged her tight and bade goodbye to my cousins except to him. How can I bid goodbye to him when he didn’t cast me a glance even when I walked towards my uncle’s van. But when we’re already travelling back to the city, I got a text from him,it said, “Take care okay? Love you as a kin.”His text made me smile.
A few days after leaving our hometown, my birthplace and my father’s place, we continued exchanging messages. He was back to pursuing me again, wanting me to be his gf now. He even sent a group message, a quote about a long-distance relationship. My heart raced then. I was confused. What was he playing at again? I told him, again, since I’ve already told him countless times before through text that he couldn’t like me. He told me he’s not joking now and he’s serious. He even told me he doesn’t want to see me again. I asked him why. And he answered me, because if he sees me again, he can’t help but like me.
And just recently, he asked me again to be his gf and I told him I have already a boyfriend (which is a lie). I don’t know if he believed it, but he replied, he could understand. I told him he’s too young to commit to any relationship, I advised him to study first. Then we had an argument over his age and maturity. He’s turning 17 btw and I am already 21. He insisted that he’s no longer a kid and told me he would kiss me without any hesitation if I was just there with him. I answered him, “just plain gross, a kid kissing me.” Then he went off after it, telling me hurtful words. He even asked me to delete his number from my phone and to never reply him again. My God, did I go too far? As what he told me, I didn’t text him again. But why do I keep on checking my phone to see if he texts me. I hate this feeling. I shouldn’t feel this. I can’t tell anyone about it because I thought it’s definitely weird and, yeah gross? I don’t love him as an opposite sex; I refuse to accept that fact. But why do I feel this? Is it normal?