This is all kind of reminding me of a time long ago with a former friend. She'd always be super keen and gung-ho about doing things (things that were often her idea to begin with, not mine), but she'd cancel the morning of the outing saying she was too tired, or she felt like she needed to catch up on housework. Or she'd say it was still on and we'd meet at 10 AM, but when I arrived at her house to pick her up she'd still be in her pyjamas and invite me to "come on in, relax, we'll get going eventually." Until it got so late there was no point going. It'd have been fine if the day had been billed as "chilling at her house" to begin with, but it was usually something a little more active planned.
The last time I ever tried to plan anything with her, she suggested we take a three day camping weekend somewhere in the middle of summer (on a long weekend). I was really looking forward to it, and since I worked retail which meant shift work, I booked the three days off. It was rare for me to get a summer long weekend off as retail operations give those out extremely sparingly, and I was excited about doing something. She was really keen too.
As the weekend drew closer, the excuses started: "I think it's going to be too hot" (It never gets very hot where I live); "I think I'd like to just go up for the Saturday/Sunday but have a day at home on Monday." "I think I don't want to go for an overnight, but drive up on the one day." "Maybe we'll stick closer to home and instead of camping, we'll do day trips to the local park." And then she just wanted to loaf at home.
I was so upset because for this rare summer long weekend off, I now had no plans and it was too late to join in on anyone else's plans. So I stayed home and did nothing, as at that late stage I couldn't find anyone else to go do things with (fun things anyway, that require trip partners). I didn't need a long weekend off for that!!
I call her a "former" friend because although we had no particular falling out, after that I got tired of her unreliability and didn't make any further plans with her.
Oh and I wish some of these people that make plans for fun outings with friends would realize that "hanging out at their place" just isn't all that exciting, much as their friends may enjoy their company, unless that was the plan in the first place. If you want to invite me over, great, but don't bill it as some outside activity and change it to "let's just loaf at my place."