Hello J.,
No, it's not a clue to get out of your marriage. All of this is fixable.
First, give your "ta-ta's" shirt to a single girl who will wear it proudly... it's not for a married woman to wear. And why would you want your new husband to feel uncomfortable?
Second, he had been cheated on with his first marriage. He is keeping this one "safe" and treasured.
Third: You both need a hobby or sport together outside of the workplace. Something sacred that you both enjoy (outside of sex). Enjoy your hobby once a week at least. it can be walking the dog, bike riding as a family, or racquet ball.
Fourth: You both came into this marriage as individuals. That's why he was attracted to you. A girl's night out is harmless if you do it openly and honestly. Try once a month.
Lunch, movies, bowling night.. what ever. You can even suggest that the girls come over to your house for bbq and game night. Set a table in the back yard. Get him into your friendship circle with their husbands...
Fifth: Plan a couples night with your girlfriend and her husband. Something simple, like
dinner and movie.
Stay out of bars, dress decent (not like a Hooters girl) and tell him of your where-abouts.
Invite him to join you later in the evening.
Plan your craft times once or twice a week after your son goes to bed. Plan two-hours of time for yourself. Ask that he do the same. And you will respect his time too.
All of this is very healthy for your relationship to work.
If all else, go to church together and find some nice families to hang out with.
I have been happily married 13 years and had some growing pangs too.
We have our couple time, friendship time and family time.
M.