There's no one alive who doesn't get lonely. Just a lot of people are good at hiding it. They all fill the void in their heart with work or significant others.
Some nights, you may want to die if you don't have company. And some "good-byes" can only be healed by a "see you again".
Not being able to let go shows how much you care. Much better than a relationship you can easily forget.
If there's something you want, you have to go all-out to claim it for yourself. Life's more fun that way.
Don't bad mouth my Kazuya-san!