Well, the whole thing started with me noticing we lived in the same area and since the forum was largely based around a common interest in tabletop RPGs, I asked her if she'd like to get involved in some local gaming groups. She agreed, and I gave her my contact info. I located a D&D campaign that was recruiting players, and mentioned it to her. I asked her if she'd like to join in. she said yes and asked me to repeat my contact info. I did, and she then texted me. We discussed character options, and she seemed really eager to start. She even thanked me for reaching out to her during that conversation.
As it turned out, the game was incompatible with her current work schedule. I informed her of this and apologized, while saying the timeframe was still flexible and asked if she'd just like to hang out at some point the next week. She agreed and we discussed schedules. I sent what I knew, while promising an update after I got the full schedule and then she sent hers to me after she had found out hers.
Yesterday, I finally got information on what I would be doing on her days off, so I sent it and asked if she'd like to do something today. She agreed, I suggested visiting the local museum where I was volunteering (a public location with a lot of people, so as to avoid anything potentially risky), which seemed good to her. I then asked what the best time would be. She responded by saying she'd check the local mass transit schedules and get back to me later in the day. That was the last I heard from her.
Any warning signs here?