The part about the suicide ""(failed suicide attempt and House ends up telling the parents despite patient confidentiality.)""

I thought that House was referring to himself at that moment, like meds would help him (house) not want to commit suicide or farther hurt himself (like the brain cancer/treatment plan)
But it does make more sense that he was talking about Wilson. Yes, i agree. :)

""Wilson probably did cheat on his wives - it just wasn't motivated by sex""

Well, you have to think about what cheating is. I mean, Wilson was cheating emotionally with other women... thats a pretty loose form of cheating... but if the women then jumped him, then yes thats cheating.
Have you given any thought to whether or not his wives were the cheating partners when he was with a former wife... did that make sense... What i mean is, do you think that he married the next wife after cheating on the previous wife with the next...

""House definitely thinks his neediness is the only thing keeping Wilson around""

I know that you are hoping against that... but i just think that if Wilson were gay (or at least bi) his relationship with House is going to be similar to that of his relationship with his wives.

Their neediness is what keeps Wilson around. BUT i think the House/Wilson relationship has lasted QUITE a long time... through a lot of marriages... 17 years if you take the Hector timeline into consideration. Does that mean that their relatioship is closer than Wilson and his wives... i don't know. What it does say is that their relationship is DIFFERENT and therefore may not JUST be based on the needed/enabler relationship.