Hi and welcome to the forum.
I think that before you try to determine how he feels about you, you need to determine how you feel about your current boyfriend. You say you're in a loving happy relationship, yet you're concerning yourself with thoughts of another.
My advice is to first deal with the relationship you are currently in, questioning why you are with him while dreaming of another. Chasing one person while being in a relationship is never pretty and always ends in heartbreak and resentment. Once you are single you can step it up a gear with the new guy. If you find that he is with someone else,..... well, at least you're no longer in a relationship as second best