Is it normal that over a year later, i still think about him?

So, when I was 14 years old (going on 15), I started dating this guy. He was my first love, my first kiss, my first sexual experience, but we never had sexual intercourse, just oral sex and foreplay.

We dated for almost two years, without many major issues. The main problem with us was lack of communication. If we had a problem, I always wanted to talk about it, so I did. He listened, but never responded, he would just ignore me for the rest of the night with no resolution and pretend nothing happened the next day. Problems were dealt with like that for two years, until I finally got so tired of feeling like a bad person for trying to communicate problems that I decided that I'm young (I was 16 at this point, going on 17), I can do better, and I broke up with him. It was one of the hardest things for me to get over.

Over the next 7 months, this guy who had an obsessive crush on me never left me alone and did everything he could to make himself appealing to me, so me, being in my vulnerable state, fell for it, and started kind of seeing him, without ever officially dating. To keep another long story short, he went completely mental and publicly humiliated me twice.

So, over that 7 months, I spent many nights crying into hyperventilation, and having to use ativan to relax me enough to sleep. Then I got worse cuz not only did I miss my ex, but I tried to cut myself because of the public humiliation.

I've since started dating someone who was an old friend that I never was originally attracted to, but we've become a great couple and we love each other very much, we've been together for about 7 months, and we've lost our virginity to each other. We have great communication and have talked out every issue that has come up. However, truly, it's been a lot of issues.

It started with him being to open with our friends about
our sex life, and I felt humiliated. Then it was that I find he can be a tad immature, and I feel like I can't take him seriously. Then it was that he never shows that he appreciates me when I do all these little gestures for him to remind him how much he means to me. We've talked out every issue and things have gotten better, but suddenly, lately, I still find myself thinking about my ex.

I see him around facebook, at my university, and he works at a local drugstore near my current boyfriend's house. I've found myself reading his comments on a website we both frequent and he seems different in a better way. We talk from time to time when I go to his work, but sometimes I find myself going to buy something just so I can see him and talk to him. My chest tenses up when I see him or hear his name, and it's just like how I felt when we were dating.

I have a feeling that, in my subconscious, I miss the simplicity of that relationship, because we didn't have as many issues or big fights as I have had with my current one. I talked about this with a friend last night and she made me feel better by having me say out loud and listen to myself when I said everything I love about my current bf, but I saw my ex on my way to school today and I feel the same again.

is it normal to miss my ex this much even when I love my current bf?