This bartender drew a heart on my tab receipt?

So, I met this girl at a (straight) bar we both frequent. We talk every time we see each other so when I saw her on facebook I added her. After adding her I noticed she has queer tendencies, but never did anything about it. The other night I went to this other bar and she turned out to be the bartender, when I closed my tab she drew a heart on the receipt and gave it to me. I left her my phone # in the receipt.....I don't wanna be biased, but was she just being friendly? I've never had any bartender/server draw anything on a receipt!