Do nice guys finish last?

I meet girls , start talking joking flirting , try to make it a relationship over time and I allways get the responce, your lovely or your sweet or funny but I just dont like you like that. I try to nice, polite, funny and fun and sometimes romantic but woman will only consider me as a friend. Its annoying because these girls I try to be with have all ended with guys who treated them like crap and they all said that they thought he seemed lovely and sweet at first. It makes me feel there must be really something wrong with me if thats the case. People tell me I should just be happy being friends with girls and that its good to have friends, but I am fed up of just being friends while heads get all the and love when they dont deserve this. Its been like this for the 25 years of my life. I have only had one relationship which lasted 6 months and was completely less. I adhered to her all the time doing what she wanted with a smile, she never wanted to do enything with me I wanted to do , like go for a propper night out or have fun meeting friends and things. She wouldnt visit my house until 5 months into the relationship. then I get a phonecall saying I dont like you anymore but you are a lovely guy and deserve a girl friend. I am seriously who gets told they are lovely when they are getting dumped?? there must something wrong with me. Sorry for ranting but I have had no love in my life and dont see it changing everywhere I go all it allways seems the same. I just dont see any light at the end of the tunnel anymore, I just dont understand why girls treat me like this, can enyone tell me whats wrong with me and what can I do to change things for me. Please dont be insulting to me I have had enough heartache caused in my life and I normally try to be caring and compionate and nice and fun, I am just feeling depressed due to how girls have treated me over time. Any usefull inciite or help or advice would be appreciated