Is it normal to sometimes feel distant in a relationship...?

Of course it is. Everybody has their own interests, their likes and dislikes. Having a relationship where two people are exactly alike and feel the exact same way about things is rare. A relationship is about learning to take an interest in the other person, respect their ideas and their feelings. In your case, I don't think that it means that it's over between you two, I think it's a normal feeling to have sometimes. Talk it out with each other, and hopefully that should help. Tell him how you feel, and listen to him as well. A relationship is not a one-way street