But don't assume she doesn't want an invite if you haven't asked!In general, allow your friend and your sweetheart to decide how much contact they want with each other, and don't push them to associate if they're not into it.Set aside time for each of them and honor it — don't drag your lover along on girls' night out (not even if your lover is a lady; queer chicks are 4. Don't ask your man if you're prettier/smarter/better at Scrabble than his last girlfriend.Don't do this ever, but especially not if his last girlfriend is the person you're going rock climbing with Sunday.Likewise, don't grill your boyfriend on what went wrong or insist that he account for his behavior throughout the entire time they dated.Their relationship is between them; it's not your cautionary tale or your soap opera. It's easier, of course, to have hard-line rules — "exes are never OK" versus "exes are totally fine" — but that's not the world we live in.Set the precedent that people who are awful to your friends are people who don't get to see you naked, and your life will be the better because of it.
This has nothing to do with some kind of Eternal Dibs situation, and everything to do with the fact that, by choosing to build a relationship with someone who treated her horribly, you're telling your friend you don't think what he did to her was all that bad. There are lots of people out there who are just as good in bed and haven't traumatized anyone you care about.
Even if you meet someone to whom you think you have no previous connection, a 10-minute conversation almost always reveals that she went to high school with your college roommate, used to be on a volleyball team with that girl from your book club, and had a six-month stand with your favorite barista.
Queers don't tend to expect our dates to come into our lives completely free of prior complication.
The reverse is also true; no matter how much you love discussing your dude with your besties, his ex can probably live without hearing the details of his current sex life. It's OK to come to your partner for advice if you're arguing with your friend, or vice versa, but absolutely resist the urge to belittle or insult one of them to the other.
Save it for your diary or for anyone who didn't date him. This can be extremely tempting if they ended on bad terms and you know you'll find a sympathetic ear.