He's literally perfect and one week ago I was ready to spend my whole life with him but now for no reason at all besides the fact the he's not my favorite person anymore, I have the urge to break up with him. We're engaged and have been together for a year :/

I'm diagnosed with BPD but don't know much about it at all. I know very little about the favorite person dynamic but from what I've researched it's exactly what I had with my boyfriend (and some ex's) except now I have it with someone else. This other person is all I'm thinking about and I feel really bad about because my boyfriend is so kind :(. I'm really not even romantically interested in this other person, just have this deep platonic admiration that's obsessive.

Is any of these even making sense 😭 Can someone tell me this urge to break up will go away or something:(