Just switch to bench press using dumbbells. It's safer, doesn't require a spotter, and encompasses a wider range of motion making it, arguably, a better all around exercise than bar bench press.

Off the top of my head I can't think of any other major exercises that require a spotter. Squats maybe? But for those you can just use a smith machine.

I used to only go to the gym when I had a friend to go with (this was back in college so it wasn't a huge pain). Starting to go by myself was the best change I ever made. Not being beholden to another's schedule for your own wellbeing is a glorious thing indeed.