Im in love with my neighbour who is in love with his gf... But i think he may have feelings for me! I love him and it hurts seeing him with someone else please help me!

Hi!
I am not good about love... Anyway I'll try to help you (if I can)...
First at all, if you think he has feelings for you, so you speak with him ? (don't know how to formulate it, sorry).
If you do, you must be sure he really has feelings for you. (maybe not "love" in the meaning of love, but... something.)If you laugh together (or something like that) you could tell him something like "yes I know you love me" (laughing of course). Just to see his reaction. A friend of mine did that and it helped her. Yep, I'm sure it's not easy to say that to someone you love, but if you think you can... just say something like that, without being serious. (complicated to explain I'm sorry).

If you don't think he loves you (it sounds brutal, I'm really really really sorry), the best think you can have is "if he's happy like that, I must be happy for him". I know that it's difficult but it's better than jealousy. He would be embarrassed ...

I'm sorry for two reasons : first, because I'm not good at English (I'm French), and second, because I am not good about love. (I help my friends but it worked with only two...)
Hope you understand me ...