<human>: Can you condense the text into a few key points?

Not heroin or meth.

I've taken benzodiazepines, antidepressants and other medications for over 7 years for severe generalized anxiety. After receiving ECT in last year, my anxiety and depression have gotten a lot better and I've been able to lower SIGNIFICANTLY my consumption of benzos to the point where I was almost quitting. Life had been good.

My partner (2.5 years) has always been very supportive and had always expressed how proud he was and hopeful that I was learning to manage my anxiety with other methods other than these medications (high risk of addiction and abuse).

However, last week I had a major bump in my life that I've felt like has completely thrown me off: I found out he might be cheating on me, although what has happened points to a misunderstanding rather than an actual infidelity. Regardless, I feel like my world was shaken and at the moment I'm back to taking the medication on a regular basis to the point where I'm almost sedated all day to avoid flipping out or "drown" in angst. 

I know eventually my partner will find out I'm back using these medications, but I don't want to make it seem as if I were blaming him or making him responsible for my relapse, shit just happened.
<bot>: After tapering off from benzodiazepines, an infidelity misunderstanding made me relapse and I'm consuming them again. Don't know if I should tell my partner because I don't want to hold him responsible for it.