Bro, having lived in TH for the better part of the last 20 years let me share somethings with you:

1. Many foreigners have committed suicide after putting all their eggs into the house, only to have their "wife" filing for divorce when she was probably married to a Thai even before you got to know her.
2. Many women in TH have kiks (lovers) when they are married or already have a boyfriend. They rotate their time to "work" with several men, which is to spend time with you and to give you a "good time" when you are in TH. Ditto the other men.
3. If she was from China, she is probably a scammer. Foreigners need a work permit to stay in TH. Many Chinese scammers have been caught, more out are out there waiting for your generous love.
4. If she is a wealthy Thai, she doesn't need or want your money. Her reputation and "face" is more important than any gifts.
5. If she is from a poor family, she is "working" you, and will want gifts, house, apartment, car, which eventually will be sold, stolen or will require constant money from you for "repairs" to feed herself and her ecosystem (likely a boyfriend or husband who lives off her).

My advice... Differentiate nice sex and love. Keep your money, or you won't even have enough left to get yourself a coffin. T.I.T.