Dating a Junior

I'm a freshman and I've never been in a relationship before and I have this guy I like, and I'm pretty sure he likes me back. In the case we do start dating, what should I watch out for because he's more experienced and is a Junior. I actually don't think he's a bad guy at all and so far he's been super nice to me, but I know I'm young and dumb. I just don't want to be taken advantage of and left with a broken heart. So yeah, what should I keep in mind when dating someone older and more experienced than me?