I've found this text about the longterm effects of being in the closet:
http://outservemag.com/2013/03/impacts-of-nondisclosure/""I have said to you to speak the truth is a painful thing. To be forced to tell lies is much worse."
– Oscar Wilde"
"Keeping one's orientation secret has the additional impact of denying part of a person's character to others, making it difficult to fully integrate with peers. If a person is out of the closet to some people but not others, it leads to a "double life" effect and isolation from the groups and people not in the know."
"The impacts of nondisclosure don't apply only to the individual in the closet; it can have a significant impact on the people they associate with, too. Failing to share one's life with friends and colleagues can lead to uncertainty, mistrust and emotional distance between the closeted individual and his or her peers. For example, it is quite normal in the workplace for colleagues to have some knowledge about each other's personal lives. While there is no absolute requirement to share this information, it can be critical to trust, networking, mentoring relationships and friendships. "
"For example, I was on a training course with a friend who was in the closet. The members in the course forged a close group, but in a number of instances, this friend isolated himself from the rest of us for the sake of his hidden social life. He repeatedly left us feeling distanced and mistrusted by avoiding our social interactions, to the point that many in the course gave up on including him. "
"Keeping a personal secret places substantial and concerning strain on an individual. Sexual orientation is a significant part of one's identity: who we love is part of our humanity and is often taken for granted in the heteronormative society we live in. Staying in the closet means keeping a part of that humanity separate, and it is well documented that keeping a secret of this magnitude often leads to anxiety and stress. "
This is pretty much what I'm talking about.