How to make my self more available for a relationship?

So, I'm a sophomore in college, and I have not been in a relationship since I was a freshman in high school, and that was also the only relationship I'd ever been in. When it comes to putting myself out there, I've always been pretty bad. I'm social, and I love talking to people, but I feel like when I meet someone, I friendzone myself immediately. For example, today I actually had a date with a girl, and I still somehow, made it seem like my intentions were solely friendly. What do I do to make myself seem more available? I'm to the point where I want to be in a relationship, and I'm kind of actively seeking one.