When I first start a relationship, everything is normal. I don’t feel angry or act out. I would say after a few months pass, it’s like a flip switches. I am always enraged, annoyed, irate. Everyone I’ve had a long term relationship with says my personality completely changes. I am aware that I get more angry, but I don’t understand how things can be so normal for so long and then out of no where, boom. 

Anyone else feel the same way? Is this normal in BPD? Any tips or advice ?

Im new to this, and understanding BPD. I just wish I could stay normal. I don’t know what makes me flip.