Dwife,
In MC, did you learn about boundaries and boundary enforcements? Your personal ones and your marital ones?
Why haven't you chosen to look at his actual phone...read the names associated with the numbers for the late-night calls, and read the text messages?
Why did you choose to give him the benefit of the doubt...your choice...not his...and what did YOU do to learn about drug addiction...support groups and books for you to read and meetings to attend?
You had trust issues coming into the marriage...did you trust blindly previously? Have you read Harley's opinion and direction on blind trust?
Learning about predetermined, progressive boundary enforcements is how you act from love, Dwife...and you can do this. Will aid you, your marriage, your mothering...all the relationships you will ever have. Worth studying to know and enforce in your life. They go around you. Your behaviors.
Alanon helps you take control of your focus on HIS stuff and put it where you have power...on your own stuff.
After he came to you and shared about his addiction...did you both go to drug counseling? Was there rehab? Did you continue to talk and share or is it only when someone's bleeding to death?
You both can change your lives, grow more intimate in your marriage and deepen your bond...you have your half. Your choice. Addicts are humans who have a lot of pain. Do you want to parent him or partner him, Dwife?
Consider all the times you've snowballed yourself...lived your life seeing it affected by others and not how much your choices make your life...like the deciding to trust, anyway. You can't be snowballed...you choose to believe or not believe...just as you choose to love or not love...to react from fear or act from love. Lots and lots of power there...and human limits.
Please consider choosing to attend Alanon meetings...or NarcAnon. Learn and understand addictive behaviors...what they are about...what's underneath. I was surprised to learn my own addictions inside...to resentment, being "right" rather than married, to parenting my partner, even, to fear.
Free yourself and save your marriage, Dwife. Learn how to talk to an addict (read up on Orchid's threads for Reverse Babble)...how to respond to gaslighting so you won't feel snowballed or bamboozled. Learn what you can control and what you cannot...as a human being. It isn't all or nothing...tolerating or abandoning...there are several steps in between. Find out about them.
Addiction negates negotiation, per Harley. I would move your post to "Infidelity: General Questions II"...gets the most traffic...and affairs are addictions to fantasy...relate very much, in my opinion, to what you're going through...
Please read all the articles here on this website...consider getting Harley's books...His Needs, Her Needs...Fall in Love, Stay in Love...Surviving an Affair.
You are not alone...you are not crazy, wrong or bad. There are many people here seeking help, support, direction and a place to practice what we learn (radical honesty, respect, etc.) who have walked in your shoes. Who will be friends of your marriage.
Welcome.
LA