Attraction is always different for different people, an individual thing. Attraction is NOT love! That this guy is interested in you is very clear in his choice of spending time with you. Attraction is a chemical thing to help us get together but does not last in its intensity for very long (maybe a year, hence the term "honeymoon period"). I think it sounds like you are doing a great job working to make the relationship a strong one on it's own merits and sounds like he is too, introducing you to important people in his life, sharing, etc. It sounds like you are growing together quite well.

Were I you, I'd remind myself of how far I've come with the new guy, what we have both shared and how the two of you are working together to get to know one another and help the relationship work. Look at your experience with the relationship instead of your fears, fears are always dicey in that they are in the "future" which no one can guess. Stay with with the experience of what has actually happened and appears to be happening in the now.