DEntal floss are pulling my teeth apart

That is alarming, the floss is just thin though, i wonder why it will cause gaps, maybe toothpicks. You could have braces so the teeth won't run, or a retainer will do.. You can as your dentist.

It is the first time I hear you can get a gap between your teeth because of flossing. Afloss wire can never cause that unless you do it for hours in a very wrong way. So if this is the case with you I assume there is something else going on but also it's useless to keep flossing. With a gap between your teeth you are able to brush in between as well. So I would quit with flossing and give it some time and see what will happen with your teeth. I wonder if your toothflesh is pulling back too because of the flossing and this is the reason of the gap between your teeth. If that is true it will harm the nerves of your teeth too sooner or later.

Use thinner dental floss. Don't use dental floss often. Use them at one strokes only.