Is it normal drunk lesbian "cheating"?

Alright here I go, i've been dating my boyfriend for a year now. We just hit our one year anniversary last week. Meanwhile for the past two weeks we've been hanging out with an old acquaintance because they work together now. This "acquaintance" is a gorgeous girl and her early 20s. She has the nicest ass I've ever seen and such a beautiful smile. I tell my boyfriend all the time how gorgeous I think she is. The other night when I want to walk her out and during a hug I don't know why but I just kissed her. She kissed me back to give me another hug and she left. After I told my boyfriend and he said that he really didn't care and that "I'm really the first guy who you've been with so I would never want to hold you back from experimenting or we're having fun." He says there are boundaries that he knows that I wouldn't cross. So me "kissing another girl, as long as it's a girl really doesn't matter." A few days later we all got really drunk and she suddenly got a phone call and went outside. A few minutes later she came in got her keys ready to go and... Of course I told her Id walk her out. She grabbed my hips and pulled me in for a hug on the stairs. But I opened the door, grabbed her hand and walked out to the car. After I kissed her and she kissed me and I backed up against her car and kissed her some more.Then I grabbed her ass and I rush of adrenaline came over me. She opened the door and I helped her in. She was stumbling and I really didn't want her driving. So to buy myself a little while I sat on her lap. Told her to call me when she safe if she has to drive right now. I stole a few more kisses, then I told her she was gorgeous and she told me I was beautiful. After I ran inside and played pong with my man. It's almost noon and she hasn't answered my text messages I sent drunk last night. I don't know if she's safe. Or if she just never wants to speak to me again. Mabey she regrets the entire thing or she could be in love with me. I wasn't looking for relationship I'm just having fun. She was having fun. But I definitely said " can't wait until you get off your period" during a kiss or too. Did I scare her off? She I contact her? Should I stop drinking? Help.