Yes, I think you are right. Not married, your partner's mother looks rude. How can you just take your boyfriend's things? If it's really your boyfriend, it doesn't matter if mom leaves. What you bought is still important. This is very unreasonable. Anyway, I feel that this mother has no emotional intelligence. If you two get married, then you two will quarrel over your mother, that's for sure. The relationship between mother-in-law and daughter-in-law is really important. After all, you can't keep in touch completely, so you should consider it clearly. If it really doesn't work, then break up, otherwise the later days may be even more sad.