Not able to move on from X

My ex and I were in short relationship. He was my friend before we moved into more than friends and now he doesn't reply to my messages or picks my call. It hurts, I want to move on but I'm just unable to.

My ex was a good friend of mine. He was in a bad relationship then which eventually ended. With that he moved closer to me. I knew it was rebound, I supported him to the best I could but I couldn't get myself into sex with him.

Actually, he is my first relationship where I've felt more than a friend. But, having a person on rebound as my first isn't possible for me. I even found a picture of him with his ex in his house and I couldn't handle it. After that he broke up with me. Told me that it is for my good.

Yes, I know it is for my good that he is away from me. He still loves his ex, he only wanted me for sex which I denied. Friends with benefit isn't for me. I need more from a relationship. But, now I miss him. It is over 3 months we have talked. We work in same office and so sometimes we have to be in same calls. It shatters me. I act normal but once I get back in my room, I can feel how restless I'm.

I think about him a lot. I've tried all distractions including making new friends. I've a friend now with whom I hang out, we go out for walks, dinner, watch movies but still my ex remains in my head.

I don't crave for sex, I crave to be with him, spend time with him as we used do during our friendship day.

What is wrong with me?

There is nothing wrong with you! Some of us just take longer to get over relationships than others. I've actually been in a similar situation and I will say that for me the best thing to do was to do positive things for myself, set goals for myself and focus on other things besides the ex relationship. I think the best thing to do is to keep yourself busy and focused on yourself, loving yourself, and in the meantime maybe going on dates with other people!

Currently, I'm having good life. Have made group of friends with whom I regularly hang out and enjoy too. Even my attitude towards life is changing for positive.
But, with all these good things, I still miss him. Still wish that he would love me, he would want to spend rest of his life with me. When I think back, look at signs of love, I can't find even a single sign which says he loves me. Infact, it is opposite.

When will I move on leaving him behind? Or will he realize my importance and come back to me for good?