I just wanted to answer a few questions that I just read in this thread for the first time.
First of all, whether we should be looking amongst the gay community:
We are not leaving out any possibility. However, from Jackson's family and all of his close friends' points of view, there was never any indication that Jackson was anything but heterosexual.
Secondly, questions about his mental health:
The family has revealed that Jackson suffered from OCD and that he was very high functioning, going to college, working, and maintaining friendships. When he tried to go off of anti-anxiety medications without any help from anti-depresants or therapy the last month he was home, he spiraled into depression, severe anxiety, and sleeplessness. All of these things combined with the harsh conditions of being alone on the streets could have led to any number of mental stresses, breakdowns or psychoses. We can only guess at his mental, physical, and emotional health at this point since there are no 100% confirmed conversations with him in 3.5 years. However, there have been several strong leads with most indicating he is fairly well-groomed, sad and confused. This indicates that there is great hope and much need to find him sooner rather than later.