How can you avoid friends who force to waste your time?
Rajesh Pathak
You must help yourself here in a clever way.

First, you must convince yourself that you are too busy to waste your time on frivolous things. If you can convince yourself, then you can convince others too. If you are sitting idle, you are bound to go for useless things. Make yourself busy with meaningful activities as soon as possible.

Make yourself super busy with studies, gym, sports, learning computer/language/musical instrument, attending outdoor events with your family, etc.

Then you even won’t have to give excuses to your friends because they themselves can see how busy you are with serious things in your life. Rather, they might want to follow your footsteps.