Question about mental health or behavior or I'm not sure so I put this under Health? I wasn't sure where else to ask this and this is my only window right now, I want honesty and actual answers on what this could be.

I have this thing where I'm deeply in love with one person and only really care for about i'd say 3 maybe 4 other people. but I don't feel any sympathy for anyone else, like I don't care if anyone else were to get hurt or d-- or things like that, as long as the one I love is by my side. I am willing to get rid of everyone else without caring how it effect the one I love, even if they care about the said people I will get rid of. Yet I want to do everything I possibly can to make the one I love happy, at all costs they must be satisfied. I do however fear what will happen if I act out on my wishes, will my lover hate me, will they be beyond broken to the point I cant please them or make them happy?

I really need answers this is driving me insane and I can't get therapy and have no one to talk to about this.