Do guys like hearing from ex girlfriends?

I feel like this guy is my soul mate, and we didn't work out because we were both young and naive, we were 15 when we first met. Now we are 20, friends, both single, both enjoying college life and have talked on and off through email over the years . We both have dated people after we broke up, we were each others first loves. I have never been able to forget him, the feelings I have for him have never died down, still strong as ever. I understand that if he wanted to talk to me he would call or email, he first gave me his new number and in return he has my whole information; but he is not connecting me. I feel so guilty for losing the best thing I ever had to being young and so very stupid. I just don't want to regret not taking action, but I have so much respect for him that I don't want to annoy or bother him. He deserves to live his life to fullest and be so very happy, and not be badgered by an ex girlfriend who can't stop thinking about him. Life is truly unfair, it is one of those situations where I wish I knew then, what I do now. I love him, no doubts or questions asked.
Do guys like hearing from ex girlfriends?
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