Jonny, this is tough. Your meds can raise libido, but the real issue is the lack of intimacy at home. You’re not a bad person, but it may help to talk to your doctor and be honest with your wife.
I’ve been dealing with similar stuff, and talking it through really helped—not just with my GP but also on platforms where people actually get it. I came across sex vn recently, and it gave me new ways to look at what I was feeling. Sometimes just hearing how others are coping makes you feel a bit less weird or out of control.