Whenever you notice that you are not enjoying the game, not having fun, then it's time to take stock and ask yourself why is it that you are not having fun. Maybe you feel inadequate or you've lost some of your confidence. Or, maybe you're going through a spell of bad golf. Now would be a good time to use your imagination and think of ways to put the fun back into your game. Some of us, in my hometown, occasionally play a round of golf with only one club using it as a putter as well.
Some clubs have an annual 'monkey' golf tournament.
It's one club of your choice and a putter. You play and switch partners every six holes. This is a real fun game as everyone gets to play as partners and there's plenty to talk about afterwards. There are oodles of way to infuse fun back into the game. All you have to do is use your imagination.