Bf issues

Me and my boyfriend have been going out for 2 years. But we argue all te time 24/7 and its over the smallest things. We really do love each other but sometimes its hard for us to not say hurtful things. Does anyone have advice? I need advice on how we can work things out. Its like ever since we've had sex we argue. Before, we never had a issue we were happy and I need to know what to do.