Passion fizzles but love remains. It’s normal to not like everything about your SO, but it’s about how you approach it that matters. Are they idiosyncrasies and imperfections that you can overlook/learn to love? Or are they more fundamental attributes or value differences that are much, much harder to compromise on? If you let differences simmer below the surface too long, the more likely you are to categorize those as the latter, so I think to maintain a healthy relationship (and possibly revive back that love, if some has been lost) you need to face those things that you say you dislike about him. Hopefully what you’re referring to aren’t really big deals.