I slept with another guy recently.
Why would you cheat on your boyfriend?
Don't try to judge me.
It's not a good idea to sleep with others when you are already in a relationship, unless you already know that your relationship an open one, which enables both of you to have other partners.  At any rate, you should try to get to know people before you sleep with them.
Don't get your panties in a bunch.
Cheating on your partner is wrong. It just leads to further distrust from them to you and you being paranoid about them finding out. You should break things off with the or try to fix the relationship if you wan to stay with them.