Ok. So let's get a few things straight right off the bat.
You like the feeling of being in love but is afraid of commitment. You want to break up to ease the commitment anxiety and worry about get more postmortum regrets.
And you seem to wonder if you are the only one with this problem?

Well, here is the answer , point blank.....
NO, you are not alone There are probably a jillion zillion others like you out there.
Sorry, but welcome to the real world, it's cruel and unforgiving. I know this is
very blunt and seems brutal but you'll come to find out that you
can't have your cake AND eat it too. You need to start making educated decisions and take the risk of being wrong.
You'll have to evaluate on which do you fear more, commitment? or being alone? Take the lesser of two evils and do it the Nike way.
There are no absolute certainties in personal realtionships. What works for others might ruin you and vise versa. You won't know for sure how it'll turn out until it is over. It kinda keeps things from getting too routine or boring. It's suppose to be more fun like this!
This is just like going through school. There are days that you probably don't even want to show up but in hind sight glad that you didn't skip out.
Don't be afraid, take courage, the angels ARE also out there to comfort and heal you after old timers like me bruised you all over, although with good intentions. Cheers.