Can a carrier of strep throat repeatedly infect me?

I had strep throat two weeks ago, a few days after a weekend with my boyfriend. I was put on penicillin and I took every dose three times a day for ten days. I had been off the antibiotics for a few days and spent this past weekend with my boyfriend again. Today I have been tested strep positive again, could this be because he is a carrier?|||Yes, a carrier will re-infect you each time you're with him.|||probably|||could be, see your Doctor