My boyfriend wants to get back together.

Today he texted me saying his brother woke up from his coma and that he's willing to get back together.

However today I met another guy, who he was so sweet (his name is Flynn) and I told him that I was single. And we exchanged numbers

Now that Mark wants to get back together with me I don't want to and I dont want to because he said some awful things to me when we broke up.

I just don't know what to do I never been in this kind of situation before.