<human>: Give me the gist of the text in a nutshell

I recently moved to a new town where I don't know anybody. My girlfriend lives in my hometown which is about an hour and a half's drive away. 
Last night I was hanging out with one of my new friends (a female) and at about 2 am I decided I should probably get back to my apartment. When I brought this up, my new friend started getting really flirty and asking me to stay the night and said I could sleep in her bed and all that jazz. I hadn't told her I had a girlfriend at this point. It just hadn't come up yet. So I declined and went home and texted my friend that I was sorry but I had a girlfriend. She understood and everything should be fine now.

Should I tell my girlfriend about the whole thing quite yet? She knows I'm making some friends who are girls, but I don't think she could have seen this coming. It's mostly my fault because I didn't tell my friend about my girlfriend sooner, but I still don't know what to do.
<bot>: I hadn't told my new female friend about my girlfriend and she asked me to stay the night with her in her bed. Tell my girlfriend now or after I get more settled into a new town?