Longing

I want to be somebody's everything. I wonder if this is natural and healthy or selfish and wrong. Or maybe it's both natural and wrong. I've been observing my relationships recently and noticing how jealous I feel when I notice another person becoming close to someone I like (whether as a romantic interest, friend, or someone I look up to). I think I feel like my relationship with them is either threatened or somehow less special. I worry they like this other person more than they like me and that they're more important to them than I am. Irrational, of course, but real nonetheless.
I sometimes think about where this kind of mindset comes from. Wherever it comes from, I believe it's been magnified by my own sense of selfishness. I want to be important, but that's not my calling. I think there's probably a reason why I predisposed to struggle in this area though. I think that's the way it is with most of our sins. Our life circumstances create brokenness and holes that we respond to either healthily or sinfully.
For me, I think it's been in part my family situation. I don't have a strong relationship with either of my parents and I find myself sometimes trying to replace that. I think there's also the issue of trying to fill a God-shaped hole with other things and people.  I'm looking for deep, unconditional, "you're my favorite" kind of love. God offers it, but I don't really know how to accept it from Him. It seems much easier to get it from people, except they're imperfect and usually fail me.

Random(ish): I really wish I were a better person.