Things fell out of place

My bf and I got back together after a break that made us realize how much we missed each other and wanted to be with each other. But now I’m having doubts thinking we’re not going to work out & what if we’re not meant to be. I love him so much & would only want to be with him. I only see my future with him. Why does it feel like he’s not mine.. is this normal after a break? How can I rekindle our relationship??