I miss my ex extremely bad.

Hi.

Three years ago I met a boy. We liked each other right off the bat. It was young silly love, but we stayed together for the next year and a half or so, and as it grew longer, it grew stronger. He was my first love, and I never thought that I could feel anything so strongly. I loved him very much.

He broke up with me very instantly, and it was very suprising. Nothing bad had happened between us, we were perfectly happy; He just said he wanted to be single.

He made a bunch of new friends away from me and our friend group, and he's completely changed. He doesn't talk to anyone in the friend group anymore at all. Especially me.
Now, where the actual point comes in, is that it's been over a year now and I still think about him everyday and I miss him more than anything in the world. Even though he doesn't talk to me at all and has completely changed in every single way imaginable, I still would do anything to be with him again.

Is this normal?