"Get" has hundreds of meanings but all are related to "acquisition". So, "I got sick" means I acquired some sickness. "He got me crying" means he did something that caused me to acquire crying behavior. "He got me feeling happy" means he behaved in a way, or said something, or did something that caused me to acquire a feeling of happiness.
The verb "get" is so flexible that it is almost possible to speak English knowing no other verb. It's not a good idea to do that though. There is almost always a better verb to use.