Please help! I am heartbroken?

[Amanda]

My crush is bi and this guy he dated a while back put on his Facebook in a relationship with my crush. Me and crush are like a couple we made out and some sexual acts. He said it was a joke but I'm not sure if I believe him. Help :'(

[Woofy]

Sounds like you can't trust him, as you are heartbroken, and he is treating this like it means nothing, its just a joke afterall, he says.
I think you need to get tough here. It is your health for one. I would go get yourself tested, and make sure your bf gets a std test as well. Be sure to see the results. Your health is at stake here.
You need and have a right to know if all is well that way.
Next, trust your instinct. I would not go further with your crush in any way, unless something changes. I don't know what, but living in doubt and mistrust is not much of a mature trusting relationship. Why would a guy he dated put on his Facebook page that he was 'in relationship' with him. I would take this face value and stop everything.