I hope you’re using good contraception. Please whatever you do, don’t have DCs (or at least if you do have them, make sure you return to work asap and don’t put yourself at a financial disadvantage by becoming a SAHM) with a man who doesn’t want to commit to you.
FWIW I’ve just ended a 9 year relationship. It was ended for other reasons, but a big factor for my dissatisfaction was that he had no intention of ever marrying me, but strung me along with promises of “things will change a lot in the next 5-10 years” since the beginning. Nearly 10 years later and we were further from marriage than we’d ever been.
I was always careful to say “IF we ever get married, this will be our first dance song” “IF we ever get married I’d like it to be an afternoon tea party” etc as I didn’t want to come across as pushy, but the more money he earned the more he started talking about us as separate entities and it became clear that he had no intention of sharing his life with me as a proper partner, I would just be a glorified housemate.
Recently I even grovelled to the point of asking for an engagement that would never actually end in marriage, but would at least be a step up from perpetual girlfriend. Not my finest moment and I instantly regretted it, but when you’re desperate for a commitment you’ll take anything!
We both already have DCs from previous relationships so that wasn’t a factor for me but for you, if you’re looking to have children you need to make sure he’s fully committed to your future together or move on asap. If he’s waiting for someone better to come along then let him find her. Better than tying yourself to a man who feels like he’s settled - you deserve better 