Marriage... Any opinions?

This is the one place I can express my inner thoughts. I post in English not to impress but to let everyone understand my problems. I wish you readers out there are willing to give me your opinion sometimes. I have a problem relating to boys. Whenever I start to feel, they always leave me. I don't believe in fate or love at first sight. I no longer believe in guys but I am not becoming a lesbian. My mother always say I must find someone that I can marry, but I don't think I want to get married. So what's your opinion? Should I find someone? Or someone to get married to? Or just stay just the way I am now? I'm 20 this year by the way.