Tricky. The 'is this it?' feeling probably happens to all of us from time to time. It's how you deal with it that's important. The love we initially felt changes over time (nothing like the initial all-consuming lust that comes at a start of a relationship and a lot of people seem to mistake for love) and sometimes it is difficult to recognise that it's still there. Who is to say how you should love your OH? There is no 'government standard' with a tick list. If you're thinking of leaving be absolutely certain that it's really what you want to do because there will be no going back to what you have at the moment. Even if you change your mind and return home the relationship you had will have changed - the very lucky ones will find it changes for the better as problems are discussed and overcome but the majority may find it's not possible to contine (the hurt caused by telling someone you don't love them doesn't go away and regaining trust is very difficult). My advice would be not to rush into anything and do all you can to try to get back the relationship you want - sit down and talk things through but be gentle. You may find you want different things but you may also find a way forwards together.