Im having some girl problems please read the whole thing it explains alot!?

Soooo i have no clue why but ive been havin alot of trouble with girls lately. Its been about 6 months scince i had a gf:/ And i have no clue why im always just like bestfreinds to girls I accully care about them and listen to them and just i know how to talk to them. Like even when im talkin to them they will be like you would be the perfect bf! And so be flirtin with me and everything, but still whenever i try to take it more then freinds and it goes no where! And its really startin too piss me off like i treat them right acclly care about them and everything and they know it but still cant get a gf:/ Please help me i just wanna know why i cant get a gf! Oh and for all yall that are gonna say like im too ugly or somthin i promise you im not i really want real answer that will accully help please!