Me and my ex matched on tinder! What does it mean?

I have an ex of 3 years that's in my circle of friends (so we are actually friends and we hang out quite a bit) we were each other's first everything and we dated for 4 months. recently we matched on tinder. I swiped right cos i found it funny that I saw him on there and I assumed that's the reason he matched too (bare in mind I had a crush on him a few months back)

i didn't think much of it but then at 5am after a party we were both at he messaged me on tinder whilst drunk with a gif saying 'heeey!' (This was about 2 weeks after we matched so he would have had to go through his matches to chat me) Recently he's paid slightly more attention to me aswell. Like is he tryin to smash or does he like me or is it just friendly? Also matching with me on tinder I don't know what the meaning of that is on his part
Me and my ex matched on tinder! What does it mean?
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