Just want to correct what was said by an earlier poster. You can have your own practice with a MA in Counseling if you become licensed. Licensing requirement for TX can be found here:
http://www.dshs.state.tx.us/counselor/lpc_apply.shtm
You can also become a licensed social worker (LCSW) if you're interested in having your own practice, but if you are more interested in Guidance and Counseling, the LPC may be the way to go.