Buying a house

So I’m 19 and my fiancé & I are looking to buy a house this year. I make decent enough money to where I can buy a house on my own and live comfortably in my state but I’m barely coming onto a year of having credit history so it’s pulling my score back. We’ve talked to a ton of lenders and they always say its best to take me off the loan because of my credit & 1, I feel like Im so tired of hearing a no and 2, I’ve talked to him about this so many times because I know I don’t have good credit yet (650’s) and we always agree to just put me on the title but not the loan until we can refinance but he’s so insistent on doing it this way. we’ve gone to his friends because they’re loan advisors & they get to see all this information which i find embarrassing. Im seen as this little girl who wouldn’t be able to do this without my fiancé. He always talks about how young I am and how he’s going to take care of me but I don’t need to be taken care of. this whole process has been stressful and it’s starting to make me upset, am I overreacting? being childish? I just need brutal honesty 😣