TIFU by telling my online buddy I'm a girl

I'm so mad at myself. I started playing a new game recently and met a more experienced player. He'd been guiding me a little and showing me how to play. He came across super nice and never got off topic from the game. So I absolutely should have lied when he asked if I was a she. I've literally been through this before where I make the mistake of thinking it won't be a big deal. But now it's pretty clear he wants to be closer. This dude doesn't even know anything about me and we are on separate continents but he's acting different. I feel gross too because I'm 18 and the more he tries to talk to me, the more I get the feeling he's probably like 16 based on the bit I know about him. Conversations going from how the game works to little details about his life feels icky as hell. It feels like it's only a matter of time before the "hey can I tell you something" message happens. I do not know you, you do not know me!!! I personally have had bad experiences with people being creepy online once they've learned I'm female, but now I'm pretty sure I'm the older one. I just wanted to learn about a stupid game. Now I feel weird and mean and also slightly hurt that he's started acting differently, but mostly gross.

TL;DR: I told someone I know from a game that I'm a girl. Now he's acting a little too close and I feel like a weirdo.

UPDATE: I did not anticipate anyone seeing this, hello?? I think this was probably a dumb way of going about it, but I mentioned that I have a girlfriend (I totally do for sure 100%) and he's gone back to normal. If it progresses like it did, I'm going to have to let the poor buddy go, but for now, it looks like uhhh problem... sssolveddd..?