Kimber45,
This is dated - there are some excellent books written on this, most of what I read is in scholarly articles that I cannot repost here.
The prevalence of domestic violence among Gay and Lesbian couples is approximately 25 - 33%. It is as common as it is in heterosexual relationships. (Barnes, It's Just a Quarrel', American Bar Association Journal, February 1998, p. 25.)
Each year, between 50,000 and 100,000 Lesbian women and as many as 500,000 Gay men are battered. (Murphy, Queer Justice: Equal Protection for Victims of Same-Sex Domestic Violence, 30 Val. U. L. Rev. 335 (1995).)
While same-sex battering mirrors heterosexual battering both in type and prevalence, its victims receive fewer protections. (Barnes, It's Just a Quarrel', American Bar Association Journal, February 1998, p. 24.)
In a 1988 study of gay and lesbian teens, results showed that the third most frequently reported problem for gay teens was violence. Over 40% of the sample had suffered violence because of their sexual orientation, and 49% of the violence occurred within the family. (Martin, A. D., & Hetrick, E. A. (1988). The stigmatization of the Gay and Lesbian adolescent. Journal of Homosexuality, 17, 163-183.)
Since the 90's trend lines of domestic abuse in LGBT couples have surpassed opposite sex couples as a natural result of better data collection - the more accepting society has become, the more likely they are to report, etc.
Here's an article on the impact of Domestic Violence on children:
http://www.dvrc-or.org/domestic/violence/resources/C74/ My professional experience has resonated with the article - children raised around DV are not well parented.
Suicide in LGBT community: I apologize for this link, its a gay pride site, but it has a good synopsis with reference to studies.
http://www.youthprideri.org/Resources/Statistics/tabid/227/Default.aspxSalient point:
Gay and lesbian youth are 2 to 3 times more likely to attempt suicide than heterosexual young people.
There's more for depression, substance abuse, etc. I don't think you'll find it difficult to unearth more. The LGBT community is open to themselves about the problems as they are trying to help each other out. They are not so open in front of the camera, of course, its embarassing.
Really up until the Diagnostic Statistical Manual IV, which is the behavioral health clinician's desktop reference, homosexuality was always associated with depression. The language was toned down as the lifestyle became more publicly acceptable, but the data is still there. Genuine happiness, self-contentment, etc. is very rare in the LGBT community - which many within the community blame on those outside putting stress on them. But the data from within the counseling room reveals that the depression comes from within - they are not happy. Many admit to be unhappy before discovering or coming out, and hoped that coming out would make them happy.
I'm keeping faith out of the dialogue per your request. I would suggest though that this is another instance where science corroborates the wisdom provided by the faith community.