Relationship.

I met a guy online and instantly we had great conversations and stayed up all night talking to each other, it's been a month & we're still going steady and have talked about having feelings for each other but he is 4 years older than I am and I am worried he's just in it for sex. I feel like I'm just being insecure, but we're meeting up for the first time next weekend and I don't want to feel pressured. What would you do?