my best friend is his best friend., what to do??? Options

[na-nancy]

so yeah, my very best friend is also my boyfriend's best friend as well.
and lately, they've been hanging out together and it's nice to see them to.
i don't get jealous, but i just wonder sometimes...
like he doesn't laugh that way with me like he does to her.
and i always wonder..'what if he ever leaves me for her?' =(
or i never have that much fun with him like they do. =(
i know, i'm being very pessimistic. =(
but whenever i'm with the two of them, sometimes i feel left out when they're
talking or joking around...i really do. It's like sometimes i feel isolated from them.
he's a great guy, like even when i'm with them he always checks with me and asks me everytime, "are you okay?" or give a little shrug or notice that he knows i'm there =)
i never told anyone or them my feeling. but yeah, of course best friends spend times together too, i definitely understand. they're like brother and sister best friends and i definitely have no probelm with that. before dating him he was kinda like that to me too (we were friends since freshmen year - now sophmores)
yeah, but i don't know..i just think and feel like this sometimes...
any advice???

[Comptine]

^ I agree talk to BOTH your best friend and boyfriend. If you only talk to one, the other might feel awkward or out of the loop = hurt.

The thing about doubt is that the more you nurture it and think about it, the bigger it grows. You're not going to get over it any time soon because that see of doubt is already there. It's only going to get worse because you're nitpicking at every thing they do. You're going to turn something into nothing by doing that. You need to address it and communicate it with your best friend and boyfriend.