Social media are interactive computer-mediated technologies that facilitate the staying in contact, creation and sharing of information, ideas, career interests and other forms of expression via virtual communities and networks.
Being social is related to activities in which you meet and spend time with other people. Remember: People using social media are not necessarily social people.
Socialize is to train people or animals to behave in a way that others in the group think is suitable.
Let’s get social but not socialized: You are hereby cordially invited to decide whether and if so how social you wanna get with me but there’s no need to socialize me. Don’t you dare!