When I watch the scenes of them together I look at the way Jack grabs Ennis's arm in the FNIT, to pull him closer into him. I think of in the SNIT the way Ennis caresses Jack. I think of the reunion scene when in front of god and everybody Ennis couldn't contain himself himself and slaps Jack's hat off his head and kisses him more passionately then he ever kissed Alma, or when their in the motel room and Ennis lays in Jack's arms, obliviously spent, and at peace.
These scenes in itself are so moving, and so emotionally charged as close to showing love between two men, as pure as simple as any love scene between men and women. It could be argue it could be longer, but why? When it hit us that first split second on seeing it, that these two were in love, and "we know the rest". JMO