My life is spiralling out of control. How can I fix this?

Hello Reddit. I am 19 years old and I am seeking advice. I am not writing this post to get pity or sympathy. I just want advice and help on what to do.

My life has become a constant routine. I live between work, school and home. I haven't left the house for over a year, except to go to the shops and work. All three of my friends have moved abroad and I don't know where to find friends or even acquaintances to spend time with. I don't have a girlfriend, and I don't know how to find one or even just meet a girl.

At work, I hardly ever talk to my colleagues about anything other than work. Occasionally, we might talk briefly about everyday topics or laugh at a meme. Working in the service industry, I constantly encounter disrespect and outright rudeness aimed at showing their superiority over me, because according to the rules, I have no right to respond or defend myself in any way.

My relationship with my family is not the best either. There is arguing at home almost every day, and it seems like it will not stop for a long time. Almost everything they do annoys me, and it seems like the feeling is mutual. I can't even defend myself from my family's attacks. They say, ‘You're younger and should respect your elders.’ So it turns out that I have to kiss everyone's arse at work and then at home.

If anyone has encountered a similar situation or knows how to resolve it, please write and help me.