Looks like things were broken off back in August 2015 assuming based on your statement May of 2016... and you mention having been single awhile now.

Do not let the fact that you'd like someone in your life to make you vulnerable in the sense that you would let this person back in again. That's called desperation and it never ends up good.

You, I believe, do know the consequences of going through all of that again. Just pause, recollect what you've gone through with this woman and let it sink in before you even think about texting and/or letting it start all over again.

hope this helps.