What i mean is, do you think that he married the next wife after cheating on the previous wife with the next...

I've heard this idea before, and although I've yet to come across anything to support it, there's nothing to negate it. I think it would be interesting if that's the case, because that behavior seems to just scream desperation.

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.

I don't think it would be like Wilson's relationship with his wives at all. For one, his marriages had the extra layer of suppressing his sexuality (and possibly aspects of his personality). It's also painfully obvious he didn't love his wives (from what we saw of his relationship with Julie) the same way he loves House. House and Wilson may lie and manipulate each other, but they expect it and also don't bullshit each other.

...Of course, that doesn't mean the horribly unhealthy dependent/codependent dynamic wouldn't be present. But I don't think it would express the same way as in Wilson's marriages.