Go For It?

Hello everyone. I have a bit of an issue and would like some advice. There's this guy I've been talking to as friends for a bit. I recently found out that he likes me and thinks I'm cute. I like him too, but there's a few things keeping me from going for it. First of all, he's a bit older than me. The oldest I've ever gone was about a year older. I'm 17 and this guy is 20. Also, the last relationship I was in didn't end well and I'm really scared to get into another one. What should I do?