Living with no obligations and responsibilities sounds somewhat unrealistic. Even kids have obligations unless maybe infants and toddlers. It’s also not affordable. Unless you are independently wealthy, it’s not realistic. “Just relaxing” sounds like a good way to spend a weekend but beyond that it’s not sustainable

You stated you are unhappy but never specified why. Or I missed it. Are you being mistreated? Abused? Are you a bad match? Is your partner also unhappy and is he/she aware of your unhappiness?

I am not sure I understand how relationship versus single hood provides structure. There’s no difference in structure for me. It’s the same. Except of course you collaborate with your partner. How is it different?

Why do you have only two alternatives. Relationship or being homeless. Are you relying on your partner for your room and board? Are you on disability? Working? I’d start by establishing some level of independence first regardless if you are single or coupled. Relying on others is a dangerous place to be