Crying is a wonderful stress releaser, or emotional "circuit breaker" that allows you to have your feelings and dispense with the emotional pressure so you can go through the emotional experience more completely. Sometimes, interestingly enough, crying can become an addictive behavior or crutch for some individuals, but when and if one actually crosses that line is a vague transition and hard to measure, as when any behavior becomes addictive. I remember about 30 years ago when that became true for me, and I'm pained at the memory of that "shortcoming" of mine, but, I'm a perfectionist of sorts, so, I'll just have to live with that "disappointment" and go on. Tell your boyfriend that if he doesn't learn to let himself cry, he'll regret it in later life through mental / emotional / and biological pressure that can make his life exceedingly and unnecessarily stressful, and can kill him. Oh, and I'm a retired mental health professional with 20+ years experience, in addition to just being human and having lived 50+ years. God Bless you, and your boyfriend.