Are Cuban tree frogs solitary or social?

Ask google. If you are keeping it as a pet, you should of done research before hand. You should of researched the minimum enclosure size they can humanely live in, their perfect diet, the enrichment and substrates they need etc. You can't just get a pet without knowing all this, and being solitary is one of the first things you would learn about an animal, because you're probably neglecting its basic needs.

i would go get one and then you'll know

These frogs are highly toxic and you can't pick them up. They burn the skin and they may rob you of your eyesite. I can't in good conscience help you to obtain knowledge of this amphibian.