Everyone experiences conflict at some point. if you're experiencing conflict with a friend or family member, the first step you should take is to

Talk it out with them..? Try to settle the argument before it gets out of hand.

This is kinda of an open question, but I would go to the person whom I have offended (or if I think I have offended) and ask for forgiveness for at least my part in the disagreement

Well if you pick a machine to work on and that's gonna be your exercise if you don't stick to that machine your muscle strength your muscle mass rather will change because you haven't been doing it you change something in your exercise routine which changes your body's form of dealing with things for example you might become weaker or stronger depending on what kind of exercises you do in whether or not the machine you picked actually your muscles grow.

Try tylenol or see a professional