Well, maybe your talking to the wrong people. or just starting off with the wrong topic. Usually i'd talk about something I like, or if I recognize someone has the same interest about something I like, I'd start a conversation about it.
Well I mean, if you want people to know ya, you gotta reach out of your comfort zone.
It's like standing in a playground, ain't no one's gonna notice ya unless you go around, talk to some of the other kids, maybe join them for a game or two. :p