I don’t have friends

I used to have friends in high school, but they were never real friends. Now it feels like everyone has friends but me. I’m not the one people love to be around, if I wasn’t there no one would care. My husband is amazing, but it’s not the same. I have friends, but all of my friends have a “best friend”. I’m never the one anyone goes to. I’m never the one who is priority. I’m never the one that people want to have around. I always feel like I’m the outsider, like I’m just there. Does anyone else feel like this? I’m genuinely tired of never being the important one. I could leave this earth today and my mom is the only person I really think would never get over it. How do I get over this?