If you *had* sex, not has
If you has sex all through July with your boyfriend, then as the posters above say, it could be either guy. Was any of the sex protected?
I agree with the ladies above. Both could very easily be the father.
The guy on july 10th and your boyfriend could easily be the father... DNA testing would be necessary to know.
We can't answer that question! DNA testing will help you answer and garrentee your child father.