Am I strong enough?

I am deeply in love with my boyfriend, however, I worry. I worry about him being alright and I worry about him finding someone better (even though I know I never need to worry about that). My boyfriend is in the Navy and I wonder if I am strong enough for this. I barely see him and we barely talk but I love him. I don't know if I trust myself, what if something happens? What do I do? I just worry so much.