I've had this - unrequited love is one of the most painful experiences I've ever had.
It's sounds silly, but just talking to him was the most exhilarating experience. I still replay some of our conversations from time to time. They have left an indelible mark on my soul.
We got together, then I finished it (stupidly) as I was afraid that it would go wrong and I'd not be able to cope with the pain. Very immature, and I did it in a way that still makes me cringe (text - yes I am a cow).
I never got over him, and 5 years after, when I was next single we got together again. For one night. Then he finished it (I don't blame him, I obviously didn't have a good track record).
The resulting pain was devastating. I cried every day for 2 years and although I did my best to stay away from him and respect his decision, I'd search his social media accounts looking for "clues" that he might still like me. How pathetic.
Logically I knew that if he wanted to be with me he could just phone me. But emotionally I really struggled to come to terms with it. I very embarrassingly got drunk a few times and liked his Tweets/phoned him but hung up when he answered. So I didn't even manage to retain any dignity whatsoever! He is probably very pleased that "I was the one that got away."
Anyway, fast forward to today, I'm very happily married and have no idea what he is doing with his life.
I feel very sorry for any Mumsnetters who are currently going through this. My advice: stay away from social media!