Is it normal that i feel smothered in a relationship?

I've started meeting this guy like 4 months ago. He's a family friend and someone arranged for us to meet for a date. Things have been difficult at first cause there has been a lot of misunderstandings, but we decided to go on with our relationship, and we'll be engaged in 2-3 months. Problem is I don't feel happy..I feel smothered. First of all, he is really a good guy, and that is why I wanted us to have a chance. But I feel he is speeding things up and it leaves me very confused about what I need to do. Throughout the 4 months we only met like 5 times, first time was with a group of friends and we hardly talked together. He is working out of the city where I live, so that's why we couldn't meet up much - he comes only at weekends.

Anyhow, I am starting to feel this way because even though I wanna give it a try I feel so pressured. My whole family is rooting for him now and keep asking questions about engagement. Even though he is kinda shy and is still shy around me whether when we meet up or on the phone, he kinda feels less restraint on chat. So, if we are chatting he keeps saying a lot of sweet words.We can talk for hours about nothing just sweet words, calling me sweet nicknames and teasing me about them for instance. When I try to open up conversations he leads me back to sweet words. I tried to drop a hint and said teasingly "I don't fall by words" but he didn't catch it. Problem is I can't reply back to his words..I can't reciprocate them at this moment, and at the same time I try not to frustrate him so I end up responding with emoticons and not saying anything serious, which is so not me. Am not being myself. Recently, he told me "love you". Twice! First time when he noticed I got a bit taken back and confused, he told me "you don't need to feel same but I just wanna tell how I feel". Second time though he said it and asked me if I wanna say something back! And then asked me how did I feel when he said these words!!
Now, that's really freaking me out and smothering me..I don't know what to do or how to deal with it. Sometimes I feel so guilty that he saying all this while I just can't. I must be frustrating him big time but this whole thing turns me off too. Now I dread our conversations on Facebook, I feel a bit uneasy when he calls, like there are too many expectations I have to fulfill. Is it normal to feel this overwhelmed by such behaviour?