You are due for a Garage door service from a reputable company.
your Garage door opener has what are called force settings and they are designed to react to or be sensitive to the door making contact with an object while it is closing or to drag or something catching on the door while it is opening.
This only works properly when the door is balanced and when the settings are adjusted to a balanced door. Your door is no longer balanced this is common and gets to this point about every two to three years as the spring/s gets weaker the door will become heavier to open, your open force setting is reacting to this like it is supposed to and is your warning that the door is in need of service and adjustment.