Been living with my girl for almost a year.
I bought a crib while we were dating and she needed somewhere to stay so I had her move in, for what was supposed to be a couple of months.
Being that it's my crib I paid about 100% of the bills and let her cover groceries. I've recently let up a bit because it's been a year and clearly she isn't going anywhere so now she helps with gas and water. Mortgage, home repairs and anything home related is still mine.
I hate to say I do it for dominance but there is some peace of mind knowing that if **** go south I can say ***** with no remorse.
The first couple months with her at my spot were difficult but they've since gotten better. I really wish I would've waited a bit longer, because I honestly never got to enjoy my crib as a single man but otherwise I've learned a lot and I'm thankful to have my most serious relationship thus far.
I will say if I don't marry this chick I will probably never have another GF live with me until we are married. Sharing space isn't always the easiest.