No spotter?

[goodfoot]

I can't really push myself on the bench press cause I don't have anyone to spot. Are there any good replacement exercises?

 

[Konada]

You could always ask someone around to spot you. In my experience most people are happy to help.

This. I don't really like Smith Machines because it gives you fake numbers (i.e if you lift 90lbs on the SM you're actually lifting lesser than that.) Ask someone for a spot on the last set if you need to. Or try working out 5lbs lighter than your intended weight if you really can't find a spotter.

 

[Kerpal]

Just drag a bench into a rack and set the pins just below your chest when you arch. Then if you fail all you have to do is flatten out on the bench and the pins will catch the bar.