I feel it's really difficult to judge a girls intentions via text. I often get the vibe that they're not interested by the language they use, but I'm not sure if I'm overthinking things

Like one girl I'm messaging I ask if she wants to go get frozen yogurt..

 "when where who?" 

"Just us" "Oh haha" "You're allowed to say no if you want.." "I didn't say no haha, always happy to hang"

Words like "happy to hang" just scream 'platonic' to me, but am I overanalysing things? I hate the idea of meeting a girl with no intentions of hooking up if she's basically trying to tell me over text beforehand