Hi.I Usually Feel Lost These Days.I Moved From India To

Hi.I usually feel lost these days.I moved from India to Bulgaria 3 weeks back for medical course for 6 years.I have a boyfriend.We have been in a relationship since 2.5 years now.Everything was good and exciting but then one night happened and I drank too much with my friends and slept with another guy.He is from my uni only.Then later that day I asked my bf what if something like this happens will you forgive me or not,he said he will because that's not cheating technically and that I was drunk.Alcohol makes the brain stop thinking in the right direction at times.Anyway today after that night, me and that guy we were friends now and we were cool.We decided we wont to do it but then he came to hang out at my place and then we were watching a movie and we ended up having it again.I feel disgusting.I feel lost.I don't know what I want in life.I wanna be better.I don't know where I am going.Help me.