Is couples therapy the answer?

I broke it off with my boyfriend because he was talking to women on sex sites and going on singles sites looking for other women. He is currently 15 hours away until September playing baseball. I broke it off in April, and now he wants me back. He keeps saying how much he loves me, even though I have refused to talk to him until last night. I got on the webcam and he broke down in massive tears saying he was so sorry and that I was so beautiful and he couldn't stop thinking about me everyday. I really don't know what to believe. I agreed to be his friend until he comes home in September so we can talk, but I don't know if I should take him back. I am afraid that when he comes home, I will make him go get tested for STD's because I don't know if he has hooked up with nasty girls and I would want to go to couples therapy because obviously he has issues and doesn't know what he wants at 23 years old. I am 22 and just ready to have stability in my life. I graduated college, have a good job, and have my own place. I am just wondering if couples therapy would be beneficial or if I should just save the aggravation and forget about him?