Is it normal i had a dream like this?

In my dream I saw my senior from my past job playing guitar with me in a party with our friends. I just knew her in the party. She played very well and she said that she is impressed with my playing as well. Then we made out and she said that we could be friends with benifits. Then the dream changed to some fast-food restaurant.
I don't know if she really plays guitar and I have never been sexually attracted towards her in real. I didn't meet her since an year.
I wonder why this kind of dream..