The idea that David and Johnathan were having homosexual relations is a fairly recent one and (ironically) is to some extent reflective of the "nohomo bro" culture we currently inhabit. It deserves to be classed along with "Sherlock and Watson" and "Batman and Robin" relationship theories wherein the evidence is "dude look at this that's gay".
Male-Male homosexual relations are expressly forbidden in Pauline Christianity and it is not necessary to utilize Levitical law or Sodom to make this argument. Right wrong or indifferent, this is the case.
Please do not use this information to behave hatefully