Almost everyone has experienced it at least once and we each react differently to the breakdown of a relationship. You can help yourself get through it, though, if you take it on in a proactive way: REALIZE that whatever is happening is part of the grand plan the Universe has divined for your highest good. DECIDE that you will go through the grief, anger, disbelief, and sadness, but ultimately you will recover, to be wiser and having grown. KNOW that love is infinite and you can generate as much as you consume. BELIEVE there are no limits to love, and in the future you will love another person and be loved more than you can possibly imagine. REMEMBER not to be so caught up with crying over a lost skateboard that you miss the Rolls Royce that's parked right in front of you.
I can't tell you where I got this from because I don't remember what book I was reading.