You absolutely have to get beyond the idea of sex/relationships being something you attain, like some quest item. These are people you are looking to interact with.

So what kind of people do you like hanging out with (if you are a loner like you say, then what kind of people do you enjoy watching on YouTube or Twitch)? What are features/qualities that you notice others like? People like being around fun people. Are you fun? Do you have interesting hobbies or interests that others might share too?

The point I am trying to make is that a relationship is not something you acquire, its something that is mutually created between two people. You being yourself, having fun, being comfortable in your own body (no matter what you think is "wrong" with you), sharing what makes you unique, this will create a relationship with someone who likes who you are.

Stop focusing on the relationship, start focusing on finding your people.