relationships

Okay. So I recently started talking to someone else and for some reason I just can't seem to stop being an asshole. Like I  get in these moods where I'm like I don't want him to leave my side but then I get mad and ended up leaving him anyway and I instantly regreat it and I never know how to brake the Ice and tell him I'm sorry because part of me feels like he should apologize even when it's my fault. I try to change my thinking but my emotions just go on impulse.. And I don't get it because I know he is a legit great guy but I can't seem to be chill but I can be chill when I have a hoe on my hands and I just don't get it😭 can someone help me .. Any one ever been through this ? Could it be a phase?