Ok
i know how to detect collision, but i dont wanna add physics to my object.
im sure theres gotta be a way to detect if objectA is touching or overlapping objectB.
please if you know, help me out!!
thanks 
No, itâs incredibly difficult to do that. itâs why game engines / physics engines exist!!!
Just use the physics in Unity, or get in to âBounding Boxesâ in unity. Enjoy!
If you are really interested buy the book âReal-Time Collision Detectionâ by Ericson.