Cheated on!!

So my boyfriend told me yesterday that he “fucked a bitch”.... at first I thought he was jokin but I noticed before he was actin really weird like he wasn’t textin me back nd if he did it was one word answers...nd he would take 45 minutes to 2 hours to text me back....nd sometimes I would’ve have to triple text to get a responses....but yes he told me nd he was just like “ i fucked up it is wat it is”.... he also kept say “it just happened”....than he blamed it on he was drinkin... than he said “i just wanted some p****”... but he just keeps brushin it off like he don’t give a fuck like I meant nothin to him he didn’t even try to apologize all he told me “was I don’t have to worry bout him callin or textin me anymore” but he still texted me after that...so i asked “if he decided he wanted some pussy and I wasn’t able to give it to him, if he would fuck another bitch” and he said “yeah it could happen”....at this point I don’t know wat to do... nd im wonderin if he actin funny cause he kno he fucked up or if he just really doesn’t care anymore....