Hi , i am 25 years old guy working in an MNC. I am in relationship with a girl since 10th standard , we are in love with each other and will get marry sometime in future.
There is an attractive girl who was our (me and my GF's) classmate since nursery and knows both of us really well , she had been through bad phase of her life as she was in relationship with a alcoholic and unsuccessful guy , she had a bad breakup and since then she was approached by many guys who proposed her and she rejected. Now one day we meet in office and went to coffee shop after that , she was very sad and i give her my shoulder as a friend in order to make her feel good , we chatted for about 3-4 hours and then when i dropped her she hugged me warmly thanked me and then kissed me on cheek to say goodbye , but that moment become so intense that i ended up smooching her. She has became more affectionate towards me since tat day.
I am feeling guilty she is really close to me and my GF . I don't want to loose my GF's trust as i love her and on the other hand, I want to run away as soon as I get the glimpse of our childhood friend whom i smooched . I don't know what to do .