Thanks for the replies guys

As far as being respectful of my being trans, she is to an extent, she doesn't use male pronouns with me, but that's fine because I haven't asked her to yet. Also, she'll be around my family who I'm half out to, half not, and I haven't asked any of them to use male pronouns with me either so that's not so much of a big deal.
Her humor can get a little offensive but so can mine at the same time, I think that's probably why we're friends.
I'm mostly just worried that I'm going to look stupid or something and just make a fool out of myself, but that all just kind of roots in my self esteem issues and trans issues, so I was just looking for some consoling words or something along those lines. Lee, what you said really helped, it's some food for thought.
And Felix, I think you're completely right. I'm never exposed much to social situations, so I think the more I take a dive into them, so to speak, the better I'll be with them overall. Practice makes perfect I guess?
Oh, and JohnAlex, I've never been to anything like that, but I'm 20 now and out of school so I'm just kind of waiting on therapy, and going full time as male to be a bit more comfortable in my own skin, and going further with social situations from there.
But thanks for the replies guys, I'm feeling a bit more at ease and she's going to be here in a few hours and I'm not as nervous as before.