Problems with my mental illness and partners family

Hi guys! I was diagnosed with major depression, anxiety and complex ptsd when I was 13 (childhood was hard with sexual, emotional abuse and neglect before jumping foster homes and girls homes, then being on the verge of homelessness for a year) I’m 19 years old now and still struggle a lot and have a lot of triggers! I’ve been with my boyfriend for 18 months now and my mental illnesses have caused a rift between me and his parents specifically due to the fact that I’m absolutely terrified of any new person that I come into contact with. One time (my boyfriends best friend and his girlfriend came down) and we didn’t know as we had come back from an activity and had no idea. We walked in and I almost had a panic attack and grabbed my stuff and my boyfriend agreed to take me home. And I said Thankyou, quietly said nice to meet you to his best mate and his girlfriend and got 5 minutes away before his dad called him and started screaming on the phone for us to get our butts back there even though my boyfriend has explained to his parents numerous times about my conditions and why I get scared. We pulled over and called my boyfriends mum and I was crying on the phone explaining the situation, that it’s not my fault and she said to just come back. We did and it was awful (my boyfriend was also injured with a cut on his leg from work, he was quite sick and I was terrified the entire time, my anxiety was through the roof and by the time his best mate and his girlfriend left his mum said we were rude (never meant to be) because my partner needed to lie down because he was in a lot of pain and I was tending to him while trying to not have a panic attack. She then continued to tell me how awkward I was, and I responded saying if I make things uncomfortable I just won’t be around for these types of things. Her response was “you’ll have to come back down for things anyway.” Just hurt that after sobbing on the phone to her and trying my best it was extremely hurtful. His brother during the night also wakes us up due to him and his friends being on drugs which makes me even more scared as well. His mum makes hurtful comments like that and his dad screams at my partner because of my reactions towards new people as it’s happened before. He’s had many conversations with them and they still won’t try to understand and Ive tried to talk about it to his mum about how I feel and it feels like she tries to turn it around on me by saying things like “what? We can’t just not have people at the house” even though I never asked her to do that , I never wanted that to happen. She asked how I felt and I did and things like that get said. I’m at my breaking point. Thankyou to absolutely anyone who reads this and can give me insight and just some advice it’s just really really hard! No matter how much I try to explain it just doesn’t help. (He also can’t coke to my house as the landlord (live with him and rent a room) won’t allow guests at this time!