Julian Edelman -- Tinder Chick Apologizes ... 'I Made a Mistake'

The woman who snuck a picture of a sleeping Julian Edelman while in the same bed -- and then posted it on Tinder -- admits the move was a huge mistake ... and says she feels terrible about it.

The woman, Sabrina, has been under fire all day long ... and has even been blackballed from Boston nightclubs ... by people who claim she invaded Edelman's privacy in a major way.

We spoke with with Sabrina ... who tells us, "I made a mistake. I feel really bad about it."

"He passed out and I was bored I guess. I was drunk ... and I made a mistake and I feel terrible about it."

Sabrina also says she doubts the nightclub ban in Boston will hold up -- "I’ve definitely gotten my fair share of clubbing in Boston – and I have friends who work there who say I’m still welcome. I don’t know if I’ll go out anytime soon – but that’s MY choice."

She adds, "Some of the players were texting me that they were really disappointed. I obviously made a mistake and I can’t take it back."