How to tell if an old flame still has feelings for me???

We have a long complicated history spreading over 10 years of us going back and forth to eachother. We always wanted to be together but our parents got in the way.

We’re texting more frequently, he has asked me interesting questions like if I see myself getting married to my current bf…

Constantly reminiscing over the days when we would fool around or referring to old jokes or things that were only between us. He even messaged me on his gf’s birthday… it was innocent but still. ( he has since broken up with her) He has reiterated how there was a very long time he thought he would never get over me.

I am guilty of playing into his jokes, and we banter back and forth… I think I already know how I feel but have his feelings resurfaced???