Let's say you're about to get engaged or move-in with someone. You're excited but there's only one problem... there's this other person that you can't get out of your mind.

Should you stick with the sure-thing relationship or take a chance with the new person. One thing you can't expect is to know for sure ahead of time which relationship will work out in the end.

So weigh the pros and cons and make the best decision for you given where you are in your life and what you want going forward.