Ok, so last night I had a dream where I was sitting in the grass in my backyard with a friend and my girlfriend. I guess we were naked because slowly at first, my girlfriend started to feelup my friend... and she started cheating on me right in front of my eyes. I had a feeling of inferiority to begin with which turned into many other emotions as she started on him. The next thing i knew, my friend had become another friend of mine which confused me even more. The friend that was there in the first place was someone that my girlfriend had liked before we were together, and the friend he turned into is someone I have been jealous of on many occasions.
I talked to my girlfriend about this dream this morning and she said she had a dream where she came to my house and found me with another girl as well... apparently i was enjoying it.
I really would like some help on what this means.

You see in the quote box I have saved a few of the emotions you experienced in the dream. I feel this dream is pretty straight forward without a lot of symbolism.

Perhaps the dream was telling you that you need to work on these feelings and talk them over with people. Talking to your girlfriend was a good start.