I want friends but I have no idea how to make them at this point in my life

I'm pretty boring to talk to honestly I'm going through a lot. My mom has stage 4 cancer. My dog is probably going to die soon as well and she is my best friend she is like 14 starting to be in pain every day. My dad who I looked up to my whole life is losing his mind with grief because he lost his mom last year and now my mom's getting bad and he never sleeps and I think probably has a coke problem or something. I have two friends who I never talk to and aren't ever there for me. I don't trust anyone I've been screwed over by all my friends and relationships in the past I don't even want to leave my house. I dated the same girl from the age of 16 until I was 22 and she cheated on me with someone I thought was a good friend to me and all of my other friends at the time hid it behind my back. Ever since every relationship all anyone wants from me is money and sex and a place to live. I get I'm boring but literally every human I've got close to just screws me in the end. I'm so lonely and I honestly just want to give up on humanity in general.