Creating groups and sending mass text messages

One of the representatives told me today that there is no option to create a group contact and I want to know if that option can be available. To send a mass text to fathers wishing them happy father's day, I will like to have that group saved separately in my contact and have other groups as well for different clients. I will also like to go back to that group and add more new clients or edit the previous clients' info. When I'm ready to send a mass text message out, I can just click on the group I need. Please help