How should I say "I'm Sorry"?

Jackie

Soooo, my boyfriend's hetero lifemate's girlfriend is REALLY pissed off at me.

A few weeks ago me, my b/f and his BFF were drinking and talking a bit about how their relationship is a bit rocky. His g/f was not there... I mentioned how my coworker and him would make a cute couple... Next day I mentioned it to my coworker and she said she would be into him and so I was dumb enough to IM him on insta about it and SHE FOUND IT!!! His g/f was creepin on his phone and found it and now I'm not allowed over there anymore.

This is like one of the only places me and my guy can really chill for the time being due to our shitty situations we are in.

I really kinda like her and want to hang with them and want to say I'M SORRY!! I feel bad and would be PISSED if someone was talking to my b/f like that.

I want to get her a cakes, chocolate, flowers, balloons, bears, lotions, candles, faxes masks, EVERYTHING!

Any suggestions or do you think I may be wasting my time...