Happily married people, please read and give me your advicešŸ˜­

Okay so a lot to unpack here. Iā€™m 21 and stuck in a ā€œyou already do everything a wife would do so why would he put in the work of making you his wifeā€ situation. This wasnā€™t the plan and I know that wasnā€™t the ā€œrightā€ way to go about it, it all happened this way because we had our first baby unexpectedly on birth control at 19. Two years later now we have 2 kids and have been living together for almost that entire time. With all that being said marriage is so important to me & 100% a non-negotiable which he is aware of & Iā€™m so tired of waiting I feel like I am being cheated out of what I deserve because I am such a good mom and girlfriend. We fight now and again like any couple but for the most part we are very happy outside of this issue Iā€™m having that is becoming larger. He always says he knows he wants to be together forever & always says heā€™ll do it when heā€™s ready and that we have other things we need to achieve like buying a home etc. but I dont feel comfortable buying a home with someone who doesnā€™t act like they want to marry me & the man is not a planner, I know he isnā€™t even thinking about itā€¦please donā€™t take this as me not caring about his feelings or being selfish but genuinely I am just confused because if weā€™ve been together this long, we have kids together, and have lived together the majority of the time I just feel like heā€™s seen all he needs to see it doesnā€™t take that long to know, Iā€™ve proven myself. Iā€™ve also reminded him that just because we get engaged doesnā€™t mean weā€™re getting married tomorrow so whatā€™s the delay on just being engaged? We made an agreement a few months back that if Iā€™d drop it heā€™d make sure engagement happened in the next 6 months bc me always talking about it ā€œruins itā€ (as if he was going to anyway) but like I said I know he isnā€™t thinking about it or making plans. I fear the time will be up and we still wonā€™t be engagedā€¦ & if we arenā€™t I think Iā€™ll be ending the relationshipšŸ„ŗ I donā€™t want to, but I feel like I deserve someone who would be so happy & eager to marry me & feels like theyā€™d be lucky too. Since heā€™s getting everything he wants out of the relationship and not me I feel used & taken for granted. As time goes on Im starting to feel resentment because my needs arenā€™t being met and I feel honestly offended.. itā€™s really starting to hurt my feelings because I go above and beyond for him & our kids I feel like he should feel lucky & jumping to marry me, and if he doesnā€™t feel that way then how can he love me? Am I wrong? Has anyone else been in my shoes?