If you have stared in the face of love or held it in your hands right before it burst, the withdrawl is so intense that you may swear to never love another person. This is only a natural reaction to want to protect yourself. If you touch a flame, you remember that next time it will burn you. You still light candles, but you keep them at a distance. I put a very high value on this idea of love and have never said that to a guy before. I have, however, come very close to it. That first intense brush has never left me.
Considering the way the brain wants you to love and actually makes your body ache for it, why would any couple who professes to be in love ever split up? Your body tends not to sabotage itself. Either one of you was not actually in love and someone is initiating the break up or you are making things more difficult for yourself than necessary and you should just stay together.
The fact is that real, true, raw love doesn't ever leave you. You BOTH feel it. You have to let go of everything that scared you before and never look back. Everything you've had until then was a placebo.