I had never dated until now and this girl showed interest on me but was pretty clear from the beginning that she also wanted to date someone else in particular.

The situation wasn't ideal for me as I really didn't want to date someone else but I wanted to give it a try, specially because she's just staying for a couple of months here so I agreed to something casual with her.

Sometimes I'm ok with the idea of her seeing someone else because the positives outweigh the negatives but whenever I get reminded I feel jealous and I'd prefer if she wasn't doing it.

She has hinted me she wants to take the relationship further, more emotional connection and public display of affection for example. I decided to give it a try because I'd also like to have that experience. However I feel bad when I remember she's having something similar with someone else so then I back off emotionally.

I'd have no problem dating or having sex with others, but the thing is that as someone unexperienced in dating, that's not as easy for me as it is for her. And even if she thinks it wouldn't happen, I think she'd inevitably get jealous, and the possibility of that happening is enough for me to not want to try.

I have spoken to her about being ok with casual dating but feeling uncomfortable with an open relationship, she also knows that the fact that she seeing someone else makes me sad because I'd prefer to have a traditional relationship with her but that because she's staying for so short it doesn't really make much sense anyway.

The idea of dating two guys at the same time also makes her unconfortable sometimes and I feel it just makes things more complicated for us than they should be, but she's leaving in one month anyway, so I wouldn't want to risk what we already have only to have a monogamous relationship for such short amount of time.

I feel this situation is kind of dumb and is probably stressing me more than it should, but I'm new to romantic relationships so it's quite a prevalent topic in my head.