Relationships

Healing after having been cheated on?

My wife of 4 years reconnected with an old friend of hers a few weeks ago. They hung out and at the end he kissed her.. for like a minute... My wife has been frustrated with my difficulties with intimacy (ED) and she had shared that was partly why she let it happen. She feels unloved when I can't keep it up and that's been a frequent struggle for our whole marriage. She wanted to try to salvage the friendship with the guy, but after a couple more times hanging out it happened again.
She says he's been a good friend in the past and wants to keep some connection with him through texting, but I feel very uncomfortable with that still.
I trust my wife, I don't trust her friend. What can I do to help me recover/heal from this knowing that this guy is still in some contact with my wife?
Healing after having been cheated on?
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