Try listening to music, podcast, anything audio to fill in the silent void. That’s something that I can think of.
Find activities that you can do by yourself. Whether it’s running, walking, hiking, dancing. There’s some activities you like to do with others, and other activities you like doing by yourself.
And, second, attitude. I know you didn't ask for advice on perspective, but so much of exercise, especially weightlifting, is mental. If you can change how you think about exercising, then you can conjure up serious motivation. For example, set a goal and consider an exercise part of a personal challenge. Or, think of it as a game with progressively harder levels to beat.
Recording all of my runs on my gps watch also allows me to share with friends who are also working out- and this makes for an opportunity for mutual encouragement and accountability. My wife and I also have a training plan on my refrigerator and this helps with the accountability aspect. Finally, it’s fun for me to check the leader board on my Nike plus app (automatically connected to Garmin and Strava) to see friendly competition with friends on weekly, monthly and yearly miles run.
Or I will try to do an exercise that can be followed in video format so that I feel like I'm following along with many others