Why

I'm so upset right now. Why can't I just trust? Why can't I just see that Andrew means well and wouldn't hurt me? i seen a questionable conversation on his facebook and I blew up. He doesn't deserve this. He loves me, or so he tells me. So why can't I just believe that and be happy? Why can't I be like a normal person and be comfortable in a relationship rather than scared? Why? Why? Why? I just want to crawl into his arms and be there forever, but I can't be with him 24/7. How can I make it thru deployment if I can't even make it thru drill?