be happy about / with ...

If you ever need a reason to be happy, think about the wonderful people you might meet and impress with a cheerful smile.

Make yourself happy and be happy with your choices, and forget about what others think of you.

I know you want to socialize, but your best bet is to wait until we're done chewing... then, I'll be happy to rattle of facts about Food Network and engage in repetitive speech about my cat with you!