How can I get better?

I've been struggling with depression for years. I often times feel so worthless it gets so hard to get out of bed. I just don't like anything about my life. Some may say I'm selfish but I've been on medication for about 6 years and I can't imagine my life without it. I've gained a lot of weight over the past year due to the change in meds and everyone always teases me about it... telling me I don't look like my mom's daughter and also telling me no one will like me. I feel like I don't have a purpose in my life and I don't think I am good looking either. I really want to exercise or do something to make myself feel better but depression saps all my energy that I just can't do it. How can I start feeling better? Covid makes it especially harder not being able to go out and do things to feel productive. I really don't like my living situation because my aunts and uncles are incredibly rude to me and I feel really miserable as a result.
How can I get better?
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