NTA.

I understand people use the scale of 10 to rate people, but its just icky. Especially when you are talking about someone you know, like your girlfriend.

I don't think that was appropriate. I would have been hurt too about several things.

The fact that he felt comfortable enough to talk badly to you with his friend, the fact that the friend thinks your bf is tolerating you when you were nice enough to get him some new clothes and also for rating you.

Its just icky all over. He should have more respect for you than to do that IMO.

Its one thing to vent or complain about something that bugs you. But I don't know how rating you has anything to do with that.