Well if its my life's experience, as I was your age and then bought a house with my gal, I ended up on the street after paying for the house, saving her life with surgery with my money from selling my stereo, my boat and my entire collection of things in life.
So, if a woman wants to buy a house with you. Tell her the truth.
She can buy it, and you can see her when YOU see fit.
DO not get screwed like I did little brother. I mean that with all my heart. I lost my entire life's savings for a woman because I thought it was the right thing to do.
But its not.
Of course you can do as you wish. You are smarter than I was at my age. Or at least I hope so.
But obviously, I do wish you think things out VERY clearly, no matter what you do. Just because I got screwed over, means nothing. It only means that some women are smarter than others.
I honestly, honestly wish both of you the best.
And yes, I am speaking to you as an older brother, who has been there, seen it, and heard it all. Especially in my line of work.