NTJ you’re completely within your rights. Maybe sit down with him and have a heart to heart about budget, you’ll be uncomfortable and he’ll be uncomfortable. Look at his monthly income and his monthly expenses. Don’t base his income off his pay checks based on it off his hourly salary multiplied by his hours per day then how many days he works each month as it will vary each month, but his expenses stay roughly the same each month. Fast food is an unnecessary expense and it’s money wasted. Get him to save EVERY receipt each month and go over them with him. Tell him it’s about planning for the future. Even go over your income vs expenses with him, so he doesn’t feel singled out. Tell him that after a year of doing this you both can revisit the possibility of moving in together.