please help

hey everyone! hope you are all staying safe. i need some advice. i’ve been in quarantine for almost 2 months now, meaning i haven’t seen my boyfriend of over a year in that time. i’d like the preface this by saying i know there are so many more people who have this worse than me, and my heart aches for those who have lost family members and those close to them due to this virus. however, my mental health has not been doing well. i had a talk with my mom and sisters yesterday about how social media is making me so upset, i can see all of my friends still able to be with their boyfriends and it’s draining. i’m 20 years old, planning on getting an apartment with him next year. his family invited me to come stay with them because he misses me just as much as i miss him. i talked to my mom a few days ago about the possibility of me living with him until this passes, and she was completely on board! she said i should put my mental health first (i haven’t been eating much, sleeping or crying all day, i truly feel alone right now). i have two younger sisters who are best friends and i just don’t connect with, i love them to death but we aren’t as close as they are with each other. they’re 17 and one of them has a boyfriend of a little over 7 months. anyways, a few days ago my mom said i should do whatever i want to do to make myself happy, just know that once i move in with him i can’t come back home until it’s safe to do so. yesterday, i told her i’m planning on going to live with him in about 2 weeks, and her tune completely changed. she asked where i’d be sleeping (his room), how i don’t feel guilty about leaving my family, and why i would put pressure on his family to feed and take care of me. she also mentioned that if she lets me see him she has to let my other sister see her boyfriend and my other sister see her friends. i’ve tried coming up with compromises, she doesn’t want me seeing him at all. she doesn’t even let me or my sisters go on walks. i’ve been cooped up inside my house for 2 months and miss him more than ever, not knowing when i’ll see him again. i’m just so torn now on what to do. i’ve always done everything to make my mom happy, but i really don’t know what to do now. i know it would make me happy to be with him, but i don’t want to disappoint her or make her or my sisters upset. last night they were all crying saying how they don’t want me to leave, and how me leaving will make all of them upset and it will be my fault. considering my only way of seeing him would be to move in with him, i explained to them that i’m trying to find a happy medium. i’d love everyones imput, and my last intention of this post is to be ignorant. i just am at a loss of what to do in order to make myself feel happy again.