My samsung keeps pressing it self

@ariochwandeya this is referred to as "Ghost Touch" and is caused by issues with the digitizer. Since the digitizer and the screen are adhered together, the best way to fix this is by replacing the display assembly. Since iFixit does not yet have a specific guide for this, use something like this video

While you work on your phone, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has a device with the same issues as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.

Repair is War on Entropy!