So I just started up my new patched game and wanted to check out these roommates
I cheated a friendship up with Hank Goddard and tried asking him to move in s a roommate, but never saw the option :/
I was on my home lot and everything!

Does anyone know how to fix this?

Fix the lack of the buggy roommate option? lol... ok you asked for it

Think you need to get him to "friendly" in the conversation status, not just the long term relationship status.

Edit: Actually I have to say my abortive roommate attempt has worked out well in the long run. Just started with Gobias as a test, but I seem to have settled him in a pretty happy life. The first roommate died, the game auto-replaced him with a different roommate, Gage Briody; and Gage got promoted to household member after I quit the game and restarted. However, Gage and Gobias get along well; they're both in science, they share the garden work, Gage is social while Gobias isn't so he can entertain while Gobias works on his alchemy (swapped out his LTW for the "use 50 elixirs" one). I've played em for almost a full Sim year now; Gobias is about to age up, they had my first successful gift-giving party ever, their cats just had kittens, and I am HOPING to get Gage pregnant by alien (one abduction but no pregnancies so far ).

Haven't had any additional roommate spawning.

Not saying the roomate thing WORKS -- it doesn't -- but if you go with the flow you can get some interesting gameplay

I am having this exact problem. It's as if the Sims 3 is confusing regular home lots for dorms. Perhaps the dorms necessitate roommates, but regular homes should not. There should be a harder option than "dismiss roommate".