Estoy pasando tiempo con la familia.
Is that right? Or Soy pasando. "I'm spending time with the family." No particular reason, just wondering :D
AJenny please see Paralee's lesson on Ser v Estar in 1. 11 This will clarify for you the different uses of Ser contrasted with Estar
That's right. Estar, not ser. That's the present progressive. Ser isn't used with these verb conjugations.
OK, this is the other answer I mentioned in the comment. Estar + gerund (ando or iendo verb ending, "ing" in English) is a verb conjugation called the progressive. If estar is conjugated in the present (like you did) it's called the present progressive. It means that the action is currently happening.
There are many threads on this forum regarding the differences between ser and estar as verbs used by themselves. They both generally mean "to be". I like to think of ser as meaning permanently "to be", like "I am American", while estar is more temporary, like, "I am tired". That's very simplistic. It can be confusing, and there are lessons in the Learning section on how to use them.