No matter what your mind wants, when we are talking about feelings your heart is making every decision. It's too hard to fight with your heart. You'd better listen to it carefully, as it always tells you the truth, tells what you really need. Maybe your mind is against of someone your heart loves, but you will never be happy if you don't follow the instructions of heart.
Love is all about trusting and caring each other. When you have the hope that your beloved one is by your side, you feel stronger and safer, than you would be alone. When you trust your couple you can walk with closed eyes, as you know he or she is there to protect you from any threat. Trust and care for your beloveds to walk the life path and solve your problems together.
For me the feeling of missing someone is the same of loving this person. Why you would miss anyone if you don't love him? But there is one difference between these two: when you miss than you are incomplete missing your part, missing someone you can't feel good without him. That is the quote saying: miss you like crazy.