Am I getting strung along here?

I met this chick on an online dating site about 5 weeks ago we hit it off and started chatting on what's app. The chat was very flirty and got sexual fast but it took quite a bit of chat to get her out to meet me. The initial date was about 2 weeks after we started chatting but I had to cancel due to forgetting I had prior arrangements that night. She was cool with that but due to her busy work schedule (or so she claimed) couldn’t meet for about another 10 days after that. I eventually did meet her and it seemed to go well. We sat had a couple of drinks, chatted, had a laugh and she wasn’t opposed to my kino or anything. Kissed closed before she left and all seemed good.

We went back to the flirty sexual chat on what's app and I tried to arrange another date, she dilly dallied a bit claimed she would have to check her rota at work etc and eventually got back to me and suggest a date over a week in advance. I agreed and we kept chatting on an off, the chat getting very sexual from her not just me. But a couple of days before the date she started claiming to be sick with a cold/flu but waited to the day of the date before cancelling. I gave her the benefit of the doubt and accepted it. This was a week ago and she's still claiming to be ill and off work but getting better. Iv kept up the pressure to arrange another meet up but she said she doesn’t want to make plans with me yet in case her illness doesn’t clear up but she's still keen to keep up the sexy chat and flirting going.

I have feeling when she does get round to arranging another date she will make it 10 days or so away again. I cant seem to get her to jump to my tune as she always has her shift work rota as an excuse and she claims this covers weekends as well. Iv kept the chat cocky/funny and flirty and tried things like so why don’t you just invite me over and prove it when she’s talking dirty etc but she's always got an excuse. I am starting to get the feeling I’m getting strung along! But the signals are very mixed from her like she said when cancelling “I’m going to have to cancel tonight...i am genuinely sorry was looking forward to seeing you again.” which suggests she is really interested.

Normally I wouldn’t even have pursued this long without getting somewhere but she is at least one point higher on the looks scale than I can usually get and a good bit younger than me so seems worth it. Plus I am sarging other women but not had much success with anyone else lately.

I guess what I am asking is if we arrange a date again and she makes it a week or so away in advance how should I handle it? And if she then cancels again what should I do?

Basically I want to tell her to step up and start living up to some of these promises she’s made ( sexual or otherwise) and actually put some effort into taking this further or I’m going to have to cut her loose. But how do I do that without seeming needy and fucking it up?