I suppose I don’t understand yet what you expect from a “relationship” that’s different from a friendship, so it’s hard to offer any advice.

If you want to have sex with someone, it helps to ask. I understand that asking has risks, so you probably want to have some sense that the other person is not going to hit you before you ask. 😉 I don’t know how to magically get them to ask you, except for maybe being generally sexually irresistible. That’s outside my expertise.

As you learn what you want, it will become easier to look for it and ask for it. Maybe it would help you to think more about what you want for now.