<human>: Can you give me the gist of the text in a nutshell?

So here's the deal: I have not been in a relationship in 3 years, and at this point in my life have not been in a relationship that has lasted longer than a couple months. I've sort of dated around the past few years, but nothing has really come to fruition after a couple of weeks, mostly by my doing. I generally don't believe in being in long term relationships at my age (just a personal belief that only applies to me), but have been craving emotional intimacy or a light, fun sort of relationship recently. 

Enter my friend [22/f]. We've been hanging out for a few weeks and really hitting it off, very compatible in bed, all that stuff. We're both pretty emotionally crippled when it comes to dating and all that, so for now we've just sort of been avoiding the issue and joking about it. But the topic has definitely come up and our jokes are getting more and more serious. This definitely sort of freaks me out and I'm still very undecided about the whole thing. 

In addition to this, I have another friend [22/f] who lives on the opposite side of the country, but we've had sort of flirtatious long distance friendship for a few years, nothing serious, though. All of a sudden she is able and willing to come visit me for four days right after christmas. I don't want to say know, and I would very much enjoy such a visit, but I'm not sure where things are going with this other girl. The smart money, unfortunately, is that our relationship won't last that long, due to our various issues, but I feel badly telling this other girl to come visit while continuing to try to maintain a relationship with this new girl. Especially if things miraculously go well, and we're together and "boyfriend/girlfriend" come christmas time. This would obviously make for some sitcom worthy awkwardness and subsequently blow up in my face. But if I tell my other friend not to come and things don't work out with this new girl, then I end up alone and sad on christmas. 

Am I just thinking with my dick? What would any of you do?
<bot>: one new romance here, one old romance far away, old romance wants to visit in a couple months, not sure if new romance will last, not sure what to tell old romance or new romance about said situation.