Confused

So I’ve been in a relationship for 4 and half years. I was 16 when we started dating and I’m almost 21 now. I truly love him and always will. But sometimes I wonder if he’s the one I’m supposed to marry? We aren’t planning on getting married anytime soon but I still think about it pretty often. I deal with depression and anxiety and have for years. Why am I questioning us now? I’ve been learning more and more about myself over the passed few years and maybe that’s why. I don’t know but it truly sucks bc I do love him. I just dont know if he’s the one. And I don’t want to ever lose him. Sometimes I think my expectations are too high. Like I wish he would be more tidy and I wish we shared a few more interest. We used to go out a lot more and do a lot more together but now we are broke and we both work all the time. We can’t ever seem to save money and I hate it. I have student loans and car payment along with your basic bills of living. We have an apartment together and have for two years. Sometimes I think it would just be easier to give up and find someone new that has some of their shit together. But also I don’t feel like that’s fair at all bc I don’t necessarily have my shot together either. I’m just stuck in this confused state going back and forth on if we should be together or not. Any advice at all helps but try not to be rude please