Nice guy needs some girl advice...please help :-)?

hi everyone and thank you so much for helping me out..i hope u all had a great fun weekend!! i juss have a really quick question..im trying to figure out why i have yet to get a girlfriend? i am not saying all of this stuff to brag or put myself up on a pedestal but i am just saying this to give examples of what people who i know have told me...im not a bad looking guy, im really nice, down to earth, laid back, extremely respectful, fun, spontaneous, likes to do fun things, would love a girlfriend to spend time with and spoil...but i just cannot get a girl interested i dont know why..i am not one of those guys who tries to hard, used lame pick up lines, or any of that...i juss talk and try to get to know them but i dont know i just cant do it...my friends who r girl have said they are shocked i have never had a gf and they all say the same but u know what im starting to just accept the fact that they r just saying this becuase theyre my friends...i juss dont get it lol..this one girl i had been talking to said shed love to hangout and then never got back to me and juss kinda ditched me...now shes in a relationship with this guy who basically is a bum and juss smokes weed all day..i juss feel as if i have helped out so many people and have always been willing to help others no matter what and have a huge heart and would do anything for anyone anytime..i juss dont get it..maybe im wrong but do girls not like guys like me? please be honest