High Functioning Depression

I think I have it and anxiety. I have good grades, do college and high school classss, am enrolled at Washington State University for this fall, go out with friends sometimes, and am generally what you'd consider a happy person. Except I'm not. I can see the difference in pictures of me last year versus now. I cry all the time, even over small things, and I feel generally unhappy and hopeless. I feel like I'm never good enough and I won't succeed and nothing is going right for me. Ever since my boyfriend and I became long distance our relationship has been going downhill and it became abusive and he cheated. I know that's a huge problem causing this. I try to get away but I always go back. Right now we aren't speaking, but I sent him a graduation announcement and he thanked me by removing himself from Find My Friends so I can't see where he is. Last night he was at someone's house until 1 am and I don't know who. But I can see my grades dropping, not a lot, but a little bit, and I don't have a lot of motivation to do my work anymore and grades have always meant a lot to me bc I want to be a vet. I just don't feel like myself anymore. I don't like being me. I don't like the way I look or talk or act. I don't want to listen to the thoughts in my head. I'm tired of anxiety attacks and crying and I WANT HELP. But my parents don't take me seriously. I've never outright asked them to take me to the doctors but I've mention how I might be helped w meds and they say no, I just need to learn to overcome it. I hate that. I know it's partially my fault bc I hide a lot of my attacks and unhappiness but I feel like it's wrong of them not to take me seriously. I'm not in danger of harming myself but that's how suicide happens. I'm just so tired of feeling this way. I want it to go away. Senior year should've been te best of my life but it's been one of the worst.