You describe a difficult situation - that is, what to do when agreements about condom use and sex may feel broken. The best thing to do is to discuss the situation and acknowledge that you are concerned about your own health, as well as your partner's health. If you focus on the health aspects and not the relationship issues, you may be successful when bringing up the subject with him. It will be a tough discussion and you have to decide if your love is worth it. With all that said, you both may want to consider getting on PrEP, and at the minimum making sure to have your provider do routine STD testing recommended for gay and bisexual men.