relationship issues, need some advice

M
So about 4 months ago me and my boyfriend had an argument, long story short his mom overheard and got upset. I am 16 years old and he is 17. I have 2 jobs, high school, and one college class so as you can tell my life is already very stressful. The thing that I said that upset her was that his family is intimidating. This offended her, well I never got the chance to tell her that my intentions wasn't what she thought. I am simply shy and have a lot of self issues so getting comfortable with someone is hard for me, talking a lot and being social is hard. As you can also tell by the fact that he's my only friend. She took this as being" mean and unappreciative ". They have told me 4 months ago that I wasn't allowed to step foot in the house, exact words. This hurt me since I really tried to make a good impression on them and tried to make them happy. I have never asked for anything and I even buy them gifts for holidays and special days. I have severe depression and anxiety so this has really put impact on me. I have thought about ending the relationship because of how much stress it's causing. She knows I have depression and still makes very mean comments which I find very immature but I try to ignore it. I work constantly and am very busy but on my only days off when I can see him she normally tells
Him he's not allowed to see me which gets very frustrating since she lets him see his other friend on the same day she said no to me. I feel like I can't do anything or say anything. That I have to deal with this and it really puts me in a tough spot. I've been with her son for a year and a half so it's hard to let go especially when he's been there for me through so much. To say the least he's really saved me, he has sat there with me while I cry and have a panic attack to try to calm
Me down. He's been there when I'm so stressed out I want to quit life. He's helped me have confidence in myself to be who I am and love who I am and respects me so much like no one I've ever met. It's hard to let go of someone like this when you know how good they are for you. I've chose not to give up, I wrote something that I want to send his mother in hopes of making things better so me and him can stop stressing out about it and I can try to figure my life out and work without having this on my shoulders. What I'm asking you guys to do is read what I'm going to send her and tell me if you think it's good, if you think that there is anything I should leave out then let me know. Just really need some advice.