Concerned For My Heart's Health

The other day I texted my ex and he texted me back. We got to talking and he called me "Sweetie." At that point I was out of my mind shocked and concerned for my already broken heart. We have been talking ever since and he keeps telling me he loves me. He knows I won't date him, or anyone for that matter but he keeps telling me he loves me and he misses me. I have no idea what to do anymore. Especially since like 5 guys have asked me out.