There are no plans as of now for Wabash, Morehouse, St John’s, or HSC to become coed. The situation at Deep Springs is totally different from theirs. In addition, because Morehouse has a sister college (Spelman), you can be 100% sure it will not become co-ed, same thing for St John’s (their sister college is St Benefict), so these two should be easy on your list.
I don’t think that’s what Bly was about at all.
But strictly speaking, what you mean is that men have lost masculine character traits (in most of the Western and Middle Eastern civilizations, it meant nobility, ability to protect, ability to cry, loyalty to others, sense of honor with regards to one’s name, words, and oaths). However feminity is not treated like the normal, default way - it’s just that those masculine character traits, which were seen as uniquely masculine, are now considered unrelated to gender, and are now instead related to character (ie., you’re decent or you’re not. For instance, if you’re a good leader, you don’t harass coworkers, be they men or women - your harassing them has nothing to do with your being male or female, but is 100% on choosing to be a creep/jerk. When someone selflessly saves another person, it’s not ascribed to their gender, they’re noble and courageous regardless of gender.) Wouldn’t you say that being a good parent, a good role model, being kind, polite, efficient, creative, thoughtful, respectful… all those qualities are important for both men and women?
Masculinity does exist (Bly for instance thinks boys needed fathers and father figures, as well as a rite of passage) and boys have been struggling to understand what being a man means for thousands of years - the earliest “coming of age” novels involve boys. Wanting to be around a diversity of men in order to learn from them is perfectly okay, too, and I’m not sure who made you think it wasn’t. However I can’t see why you think being a man is not perfectly acceptable socially, in fact it’s often still a “default mode” for many people.
Unless what you call “masculinity” is toxic masculinity or behaving like a neanderthal, in which case yes it’s not acceptable and likely won’t be at men’s colleges either. Note that Bly would have vigorously opposed toxic masculinity.
What you need is probably a double environment - one where you’re able to live in single sex male dorms while also getting accustomed to women as classmates, authority figures, leaders, etc. Even if you’re gay, you won’t be able to live a life purely with men, there’ll be women in your life, and your ability to be yourself around women will be very important to you as you grow into the man you can be.
I understand that you have no problem working in a co-ed environment so being in a coed university with single sex dorms may be a compromise for you, so you can add more universities to your list. You already have a few possibilities, ranging from the super selective (Deep Springs) to moderately so (Wabash, StJohn’s, Morehouse, HSC) to in-between (Hendrix).
For all co ed universities, the existence of a male-only freshman dorm can be a dealbreaker for you - you can email Admissions at every coed college you’re willing to consider and ask them directly whether they have single sex male dorms for freshmen. Cross out any where the answer is “no”.
In the end, once you’re comfortable with college, living in a co-ed dorm (perhaps, by floor only) will help you get accustomed to living with women, which is likely to be part of your daily life. This way, it’ll make you less socially akward or more comfortable in that part of your life, too (ie., outside of class/work). But it doesn’t have to be right away as you start college.