No. I dont think it would work out. It wouldn't work for the ppl ur dating b/c they would b really uncomfortable w/ it and it just might be uncomfortable for u and the person ur living w/ b/c they would always feel jelous in some way b/c ur attracted to some 1 other than them. I wouldn't recomend it unless, like in Will and Grace, one of u are gay and since u are attracted to one another i don't think thts the case.
Don't do it.