is it a good idea to get a cat if you live in a 3rd floor flat

i get lonely a lot as i don't have a support system and have lived alone for 20 years now, i suffer mental problems which are hard to bare as well...and someone in my posts suggested why don't i get a pet?

i struggle to get out because of high anxiety and paranoia, so i don't think it'd be a good idea to get a dog....but i was thinking what about a house cat?