Is it normal to be jealous of my best friend's boyfriend?
Let me get the two obvious things out of the way: 1) I do not have feelings for my best friend's boyfriend (he is NOT my type) and 2) I do not have feeling for my best friend (I mean, I love her, but it's all very platonic; besides, I'm straight and so is she).
What I mean is, I get jealous of the time they spend together because she used to spend a lot of time with me. He's in town visiting now for the entire summer (the rest of the time they're doing temporary long distance) so they are with each other every single second. I know I'm probably being petty, but the thing is, if it wasn't for me, there's a big chance they wouldn't even be together. She was terrified of ever talking to him and I gave her advice on what to say, she took my advice, and it worked.
I've had this happen all the time with other friends, but the difference this time is that I live in not only a new town but a new COUNTRY and she is basically my only friend (I've tried making others but every time it just crashes and burns).
I don't want to be jealous of this guy. He's really really nice. In fact, I've kinda come to see him as a friend in a way because we've hung out a few times (since she won't hang out without him obviously). But it's like, right now they are with each other every minute of every day. I can't even get one minute with her.
Is it normal for me to feel this way or is this some sort of shit I need to work through in therapy?
EDIT: Yes, I know that obviously he's only here for the summer, but she tends to spend a lot of time on the phone with him and everything even when he's away. It just makes me feel like I'm being a shitty friend when I don't even know what I'm doing wrong.