Is it normal to only truly care about one or two people?
I'll start by saying that this isn't some silly relationship post. I don't have some 'crush' or anything like that. I am in a relationship currently with someone I do care about, and for the most part, can trust. But not 100%. Yes, I tell my girlfriend that I love her, but I can never be 100% trusting, or sure that It'll be something that lasts, no matter how many times we tell each other that it will, there's always doubt in my mind.
Now, for the main point; there is one specific person that I care about more than anyone else in this world. And that person is a family member. My niece. A beautiful, sweet, innocent little girl. She is the only one I truly feel that I would defend or protect until I die. She is so incredibly important to me, and I can't really describe why, I don't think I'm really very sure myself. The only time I really feel happy is when I see her smile, it brightens my day and I feel a sense of purpose to my life.
I suppose I'm not even sure what I'm asking here, it's more of a question of 'why do I only ever feel happy when I'm around one person? Am I depressed? Do I have some sort of problem?'
And why can't I trust the other person that I should care about so strongly? It's not like she's ever done me any wrong, I just can't feel happy in any scenario other than the one I described above.