Summer Threesome

This past summer I went to a Saturday night swim party. My boyfriend couldn't go because he is in the Army Reserves. There were more people than I expected and didn't know most of them. After much drinking went on some of the girls were flashing their breasts and quite a few were swimming topless. I flashhed my breasts a couple times and started talking to a real cute guy. He invited me to smoke some weed in his van and I excepted. I think his name was Ryan but I'm not sure. So, Ryan and his friend and I got in his customized van. We just sat talking and smoking for awhile. The van was beautiful and had a tv and a bar in it. Ryan started making out with me and I didn't try to stop him. The other guy just sat there but when Ryan took off my bikini top the two of them started to touch and fondle me. I know I should have stopped it then but was aroused and let them strip me naked. At first they took turns giving me oral sex as the other fondled and kissed my breasts. By this time I didn't want them to stop. For the next hour or so I had intercouse with both and gave both of them oral sex. Never once did I tell them to stop or object to anything. I'm not sure which one it was but I even had anal sex for the first time and didn't object to that either. Afterwards we went back to the party but the next day I regreted doing it. They didn't rape me or anything and I allowed them to do whatever they wanted. I am so fearful that my friends will find out what I did I have skipped some parties fearing I would run into those 2 guys again. I still don't know who they are and I'm afraid to ask anyone. I'm not even sure what the second guy looks like. As much as I regret having sex with them, it was the best sexual experience I ever had. I orgasmed more that night than ever before and was sore the next day from it. I wasn't a vigin by any means but had never before had sex with two strangers especially at the same time. If my friends find out they'll think I am a whore and if my boyfriend ever found out he would dump me. As bad as I feel about it I masturbate sometimes recalling that night. I don't know why I let them have me like that and still can't believe I let it happen. I've told no one and if any of my friends bring it up I will have to deny it.