Insecurity

I'm in a relationship with my boyfriend and I'm a little insecure. Its been a year since we started casually messing around but we've been good friends and coworkers for a little over two years. But when we had first started messing around he had told me he wanted to date me. Then after months of mixed signals he told me he wasn't ready for a girlfriend. So we continued as FWB. Now that he's committed to me and wants to be with me, I still have doubt's. He hasn't given me a reason to feel this way since we've started dating again (its been over a month). But I'm still very insecure in the relationship. I don't want to get too emotionally involved, just in case he decides he doesn't want me anymore. 😳