Is this abusive ?

Me and my boyfriend have been dating for one year in the beginning of our relationship when he was trying to cuff me we would be otp all day everyday and he would be so nice to me and send me long paragraphs of how much he cared for me and all was good until about 3 months in he would always want to accuse me of cheating and being a liar which i haven’t been at all through this entire relationship..then if something doesn’t go his way he will say mean things and block my number so I couldn’t call him..he will always threaten to leave me and be with someone else if a thing doesn’t go his way...it seems like there’s always something wrong and if I try and talk to him about how I feel he’ll say I’m fighting and arguing and to go somewhere else with that because he doesn’t want to argue and he just will hang up and not pick up if I call him back..Also some days he doesn’t want to talk to me at all..I’m tired of all of this..