Trouble in relationships arise like the sun; inevitably. But unlike the path of the sun, the path of trouble is unsettled, capable of developing into a myriad of outcomes.
A fight between couples is heart wrenching and worrisome because both people become upset and make-ups are always awkward. Often, instead of an awkward makeup, the couple breaks up and the fight is settled that way.
Trouble in dating can arise from past activities that affect the relationship in the present, like if one person keeps mentioning past lovers and/or does things which reminds them of him or her while being with their current girlfriend or boyfriend.
Also, fights occur naturally depending on stress levels and moods of each person in the relationship. I find that it is helpful to take some time and space away from the other person when tension arises. Sit back and try to rationalize the situation using facts and challenge yourself to put away negative emotions which fuel anger and frustration. Often, this process is enough to clear your head and make yourself feel better. If after some time apart, you still feel unsettled and upset with your partner, face them and speak clearly about what is troubling you. Don't make things worse by crying or becoming enraged.
Good luck with trouble in dating and your relationships because they are hard and tricky to handle. Remind yourself to sometimes stand in the other person's shoes even if it is just for one moment.
