can someone tell me whats wrong please

this is pretty embarrising but my girlfriend isnt the least bit attracted to me physically and has told me so but not why.can someone please tell me what is wrong,am i too skinny,deformed or what coz its driving me mad.this isnt one of those things where i want people to reasure me theres nothing wrong so please help me out and tell me all the things that are unattractive about me.if u think im ugly just come straight out and say it,it wud help more than telling me nothings wrong. ive just posted some pics, please help thanks