Am I just her tennis buddy?

There's a girl I used to work with for a short while. I found out we both play tennis, so I said we should play some time. She was up for it. So over the span of the next couple of weeks I asked her twice to play. Both times she was out of town, but told me that she was still up for playing and offered alternative days (which ended up not working for me).

So, despite myself, I gave it one last chance and asked her a third time...and she agreed. She came and played that very night. I was a little disappointed because that meant I wasn't really on her mind since she wasn't doing anything and hadn't texted me and said "hey, let's finally play". But she did drive over to my neighborhood, in fact, which is 40 minutes from her house. I thought it was fun.

When she agreed, I sent her a text, joking "loser pays for drinks afterwards" to which she didn't respond. She still came and we had fun. At the end, I tried to think of whether I should ask her for ice cream or something, but couldn't think of anything so we parted ways.

About an hour after we parted ways I got a text from her. She said thanks for playing and it was fun. I then told her that next time we played, I'd show her the lake near my house (since she'd never been in my neighborhood before). There was no response.

It's been two and a half weeks since then. I haven't heard from her since.

Should I even bother asking her to play again?
Am I just her tennis buddy?
Post Opinion