Not the relationship/ marriage type

Anyone else feel like after experiencing enough relationships and heartbreak, friendships, toxicity, and watching people’s lives fall apart from ruined marriages, that maybe it’s just not for them, like I crave to be loved in that way but I no longer look for it or expect it, I stopped being on social media, basically stopped going out, I don’t really entertain people when they come into my life bc they’re just going to leave so why bother, I’ve been heartbroken from people not just relationships. Family, best friends, ex fiancé they’ve all broken it down into nothing, now I don’t really have the need for companionship anymore. I’m good with watching movies about it or cheering others on but for me, I don’t think I’m going to put myself in that every again honestly. Not for it to sound like a sad topic either, I’m just genuinely curious if anyone else feels that way, at whatever age bc I’m only 19 and I’m good with just being by my lonesome now.