Sex with someone new?

Samantha
My boyfriend of three years recently broke up with me. We've broken up before and have gotten back together and I have a feeling that we will get back together again but I'm unsure if I should try having sex with other men now that I'm single, as my now ex-boyfriend is the only man I've ever been intimate with. I've always wondered what it would be like to sleep with someone else and now I have a chance but I'm worried it would affect the chances of us getting back together which I very much want to after a while. Should I just go ahead and sleep with someone else or wait to get back together with my ex eventually if possible?