How can i get revenge?

So me and this kid have been talking for awhile. And there was this girl I knew that liked him and they would hangout but he told me he wasent interest(I'm not stupid iknew he was lying) but we still hungout and I got feelings for him and we hungout more and let's just say right now we think I'm pregnant. But I found out today he asked that girl out. But still calling me babe? Knowing I'm on facebook tooo? Why would he ask her out in our situation? Idk what to do or say. I need advice!