Will he read self-help books or talk to someone? NO! He had training with mental issues while in college so there is nothing he does not already know. Would he take meds to make him feel better? Nope.
Too bad that he thinks having had the training before means he doesn't need to read or find out more. The good thing about reading, especially if he doesn't want to go talk to anyone, is that it can challenge him to practice what he already knows.
I also agree that you should focus on you and relieve your own stress by taking time out - doing whatever it is that you find relaxing and enjoyable - cooking, walking, etc. Hopefully, you get to go swimming in the water park soon... I remember you enjoyed that alot last year.