Many new players work hard on their tennis game, for example, taking lessons, conditioning, playing matches, etc. Finally, they get to a level that they feel they belong. Once there, they often forget the work ethic and commitment that got them there. Players that they use to beat begin passing them by. At this point, many players tend to get discouraged and drop out of the game, what a waste. If you truly love the game and all it has to offer, like the social connections, competition, exercise, personal challenge and more, then use that as a reason to reinvent yourself.
Tennis is a lifetime habit. Start doing some other things that will help your game. Start walking or join a gym to improve your strength and stamina. Set up a once a week practice session with your friends (non-match play) to gain consistency and confidence in the new strokes or plays you are adding to your game and to improve some of the weaknesses. Watch your diet, take a bike ride, try a yoga class to improve flexibility and most importantly take a weekly lesson, not only to help you improve, but to help you stay focused and motivated. Incorporating any one or several of these suggestions into your weekly routine will help you maintain your physical conditioning and help improve your game. By maintaining your game, you will ultimately be happier and healthier, both mentally and physically.
Remember the expression, "Use it or lose it!" I say you owe it to yourself to "use it."
Good luck on the court!