What kind of love is this?

I’ve met my perfect match at my local gym, the type of girl I’ve been waiting for my whole life. The girl I wrote a list about back in hs/ college about what I want in a future wife/mother of my kids. She’s my best friend, my biggest supporter, a ride or die, and spoils me as much as she can. We share the same hobbies, life goals, dreams, humor, taste, mindset, and much more. And I wanna say that I wanna marry this girl but something’s been holding me back. We’ve been dating for almost 2 years now and everything has been perfect like romance movie perfect and she’s been begging for a ring since the end of the first year. Only thing stopping me is that she has a 4yr kid who’s amazing but since we’re both 23 I obviously was originally very hesitant about being in a relationship since both of us are so young . Since we’re so young I’ve had a lot of plans and dreams that I wanted to achieve before even having a kid and I’m afraid that some of those dreams and plans may never come into fruition so we can raise the child properly without messing up their pysche for our own selfish reasons. I brought this issue up with my partner and she says we’ll either figure something out or hey you may not to get to ever live those dreams. I wanna stay with this girl but I’m afraid if I don’t get what I want I may grow to resent them in the future. For the past half year I’ve been dealing with constant anxiety, stress and insecurities partially due to this relationship and other personal issues. It’s been hard for me to be in peace and that doesn’t feel like it should be normal. I understand most relationships aren’t perfect and go though their hardships but it feels to early in the relationship to be feeling this type of way. I can’t stay away from this girl because not only is she everything I ever wanted but the connection we share together is as strong as 2 characters in a Nicholas Sparks love film. We connect so perfectly I’m afraid I’ll never be able to find a person as special and such a perfect match for me as she is. I’m now in a limbo state where I don’t know what to do. I don’t want to leave but my gut can’t seem to fully accept my situation.