Best Friends :s

I have been going out with my boyfriend for 16months, I love him ever much. (Now i'm so against cheating on people) My best friends are guys, one i have known for 13years (Y) and he is my bf's best friend too and the other i have known for 3year and he is also my x (x) and my bf and him dont get along. about 14months a go i hooked up with Y and then the other night i sleeped with my X and i have hooked up with him befor too.