1. First of all, you have to find out the purpose of this house. If the parents bought it, they will repay the loan in the future. I suggest not to add it.

2. If the house is the down payment paid by his parents, the loan will be repaid by you in the future. Whether it is added or not is your common property, but you account for a small part. If you feel safer, you can discuss adding your name.

I still suggest you consider changing your name after you get married. If you bring it up now, maybe his parents will have a problem with you (if your boyfriend takes the initiative).

After reading what you added, I also added the following:

1, I always feel that if two people live together, they should enlarge their hearts and don't care about small things. Considering that you get married and have children for your life (also your life and your children), you can do all these things on a large scale. Too much care is frustrating and tangled, and it may even hurt your feelings.

Whether parents live with their children depends on economic conditions and habits. If the conditions are better, it is no problem for parents not to live with themselves. If people want to live together, you can't help it (unless you don't marry).

Parents have no obligation to provide jobs for their children. Parents have no obligation to buy you a new house alone. It is natural for a person to buy a house as a new house. If you don't buy it, you can't ask too much of your parents. You can afford your own house, but when it comes to supporting the elderly, you should do your duty.

4, really planning to get married, mainly depends on feelings, will not be affected by other things too much. Two people are really together. Well, the house is not your property after all. If he is willing to add your name with his father's consent, everyone will be very happy. If he won't, you have no right.

Anyway, I still advise you to take it easy. After all, you are interested in this person. From the wedding day, the wealth you created together belongs to your common property. The rest, whatever. Never threaten this matter.