i think you need to unpick some of your assumptions here, OP. Unless you mean you left an unhappy home environment very early or were in care or something, most people of either sex will have been ‘looking after themselves’ all their adult lives. And yes, merging lives or cohabiting once you’ve had more adult solo life is probably more challenging than if you do it in your early 20s.
But you’re making some strange assumptions about relationships that ‘move forward’ (do you mean towards cohabitation/marriage/children?) and independence — are you saying you stayed in a non-moving forward’ relationship for years precisely because you didn’t want to move in together? Was it happy? Did you end it?
What strikes me too is how passive you sound about your current relationship. You say your new relationship (how new?) is ‘moving forward’ and you think that ‘soon enough you woukd be asked to move in together’. It’s not clear why you think ‘who I am’ would change at all, but you realise that moving in together isn’t compulsory? If you don’t ever want to, make that clear to your partner, so you’re on the same page. It doesn’t mean the relationship can’t work and be happy and committed. DH and I spent six months a year apart every year for ten years, because I worked abroad. I have happily married friends who live separately most of the time now their children have left home. I have a new friend who lives in a different country to her longterm partner.
Unless you want to have children together, there’s no particular need to cohabit, unless you want to. And there’s no such thing as ‘the one’. Thete are many people each one of us could potentially be happy with. I’ve been with myDH for 30 years, and I’ve met a few men over the years and recognised that they were people I could have had a happy relationship with.
I’d take the idea of ‘moving on’ out of it for now, and focus on whether the relationship is making you happy.