Am I over thinking this?

After over month of my partner not getting an erection. He opened up to me and said he uses some types of injections weekly to help him.

We lived separately for almost two years so, I was not aware.

He told me he use to have premature ejaculations and went to the doctors regularly for refills, but ran out.

So, he got a new prescription. Since then, I have felt betrayed, lost, and confused. When I see the injections my body shots down, I longer want sex. He figured that out and hides them.

Some days I feel very depressed by it because, what if this was another issue, would he would have told me? If it helps, he is 42 and I am 36. I am also worried of what the long-term consequences are.