Boyfriend Has No Sex Drive

My boyfriend of 4 years takes medication that makes his sex drive low. As a result we haven’t had sex in over a month. I’m going crazy. I try to initiate it but he just says he’s tired or would rather just spend time with me. I know he hasn’t lost interest because he’s constantly waning to see me and text me... it’s just that our sex life has taken a nosedive.

If anyone has experience In this, how can I get him back to wanting sex?