Okay- where do I start?

I have three best friends- T (male)B (female) and V (female.) T used to have a thing for me, but he eventually moved on.

I introduced T and V, and they immediately hit it off. Soon, T and V were both confessing that they really liked each other. So I helped them out and now they're dating.

And now I feel like shit.

B isn't around as much, and whenever I'm around TV, I feel like a third wheel. They obviously identify with each other a lot more than they do with me. And it pisses me off so insanely much. I sort of wish that they had stayed away from each other. Then, of course, whenever I think that, I feel terrible because they're happy with each other.

Never mind that V is about five years older than us and says that certain habits I have are juvenile and what she used to do in high school (here's a hint- I am in high school.) It's just something else that pisses me off. And I have no idea what to do about it.