Is this stress or anxiety or what?

I'm not a doctor, maybe this is totally normal. But, my mom got a boyfriend and I hate him so much. I hate the way he talks and behaves i mean he's not a bad man, but he doesn't have a work or car.. I don't see her a lot during the day because she literally sees him at the day after work and then again at night.. I'm crying almost everyday. She even let him use our car and when i got my licence i cant drive this car because it has more horses power then what's allowed for a beginner.. I'm jealous and mad and stressed everyday i think my immunity came down because of this stress everyday and crying because i have reoccurring infections. And idk what to do to calm down and just stop.. And it's not only about my mom.. Literally everyone makes me feel bad.. My friends aren't that close to me anymore because we don't go to same classes anymore they are friends with each other i tried being friends with them and close like before but it just doesn't go like before.. I met a new friends but they have old friends which are obviously more important to them than me and i understand.. In school i don't have real friends.. I feel so bad and it makes me overthink and stress and cry. Some days im happy because of my boyfriend because im lucky to have him he's the only one that understands and im so happy with him but when i come home i break down and cry sometimes.. I don't wanna see therapy i just want ways to deal this on my own i feel so bad and guilty because I'm always a weak person. Also my dad doesn't care about me at all he has a new family so...