Most Helpful Guy
That's not too uncommon. It's a reason why a lot of people don't like being a 'rebound'. A lot of times a person coming out of a long relationship ends up in another relationship relatively soon, while there are still a lot of unresolved emotions and she is still not over the original partner. The rebound can help her move on with her life, but it is a little rare that the rebound ends up becoming a new, stable long-term relationship.
And it is generally because of reasons like 'broken trust', or unresolved feelings of abandonment, or anger issues, or a desire to go back to the original partner. And everything will be compared. Sex with a new partner is going to be exciting and new, obviously, but a long term partner will have learned all the 'tricks' to really make a partner tingle, and once the newness wears off the rebound relationship, they are being compared to someone who had years of experience with the plumbing to get it just right.
So, my advice to you, would be to not rush anything. Don't force this relationship. Don't move faster than you want to, don't expect it to solve all your problems. But don't hold this guy guilty for the sins of the other. The important thing for you is to try and heal yourself emotionally and get comfortable with the idea of leaving those 5 years behind as memories and lessons and move forward to new adventures.
Most Helpful Girl
Take your time