I hope I'm putting this in the right spot on this site. 

Anyways, I have an opinion or what would you do if you were in the situation kind of question.

So I have this friend. I barely see him in real life though I used to when he lived closer to me. We talk a lot online, and he's always commenting and "liking" what I post on Facebook. So I think we're cool with each other.

Thing is though, I don't present myself as male on Facebook, or to him. I knew him before I realized all this, and I just don't want to freak him out or make him like me any less. I bet he'd be fine with it, but here's the thing. I like being seen as female with him. I always have. I don't think I want him to see me as male. I don't feel like the gay/bisexual guy I normally feel like.

Another guy posted something like this before, and I totally realized it's how I feel.

But this makes me think that I am lying to myself or maybe I'm not trans if I feel female with him or whatever.

I like him a lot, and I feel so feminine around him. We're planning on hanging out again soon like the old days, and I just don't know how to present myself.

Has anyone else felt like this? What did you do? How did you feel about it? Is it really a problem?

I don't see it as a problem in the short-term if you feel  like presenting as female around him. You should be free to present as you wish. Maybe you are bigendered and are only just discovering this. The issue comes if your relationship with him as a female starts to mix with your life otherwise/where as a male. You might then run into difficulty then and you should prepare for it. Maybe you should talk to this friend about how you feel and how you see yourself. That might be benefical.