All love ends in tragedy

I don't understand what the point is in engaging in a romance. Sure, you're around someone who makes you feel good and is left with great memories. But then what? These good memories are there to haunt us. We're not immortal. Someone has to go. You end up feeling depressed over the other person not being there with all of these negative feelings consuming you. It's the emotional dependence that scares me the most. It's not good if someone is "the air you breathe" or like the day is not complete without the other person. That person is not going to stick around forever after all. When you're single, you answer to no one but yourself.