Self Examination

So I have been sitting here debating on if I wanted to write anything and it's like the words just won't come out. I usually write a poem or something and that expresses how I feel, but right now I am feeling some kind of way and rhyming words just won't do this time.
I am so upset, frustrated, and confused and I need someone to help me understand. Men say women are impossible to understand and women say the same about them. So my question is, what makes people so impossible to figure out. Why do people think the way they do? Why do people act the way they do.
I will share something personal. I started "dating" a guy who I had been friends with for about 10 years. We were on the track to a possible serious relationship when all of a sudden he backed away and not too long after he tore me down and cut me out of his life. I later find out from a friend of his that he was upset I had given this friend my phone number. I saw no wrong in it considering he had decided he was not wanting a relationship or anything. Finally some months or so later we talk and he tells me that he found out he had a child he didn't know about and he just wanted to cut the whole world off. He hurt me the way he did because he really cared about me and liked me and he wanted me to go find someone who I deserved and not wait around for him.
That was in a nutshell but all I can say to that is WTF! Does that make sense? If you cared about me then why not let me be there for you. Why belittle me and make me feel like crap and then tell me it is because you cared about me. How screwed up is that? Where does this thinking come from, and why do I let it bother me? I am supposed to be on the path God has for me and it's like nonsense like this comes along and suddenly I'm off the path.
Everyone wants to be loved. Everyone wants to be needed. Everyone wants to be cared about. But I am starting to feel like it is more trouble than it's worth. I just don't know anymore and that is what scares me because I feel like uncertainty indicates a lack of faith and a lack of trust in God. I am trusting God to lead me and guide me, or so I say. But now I have to really look at my heart and see am I really allowing Him to lead me? Or am I trying to do it myself? Self examination. Painful... But oh so necessary.