You didnt mention using a decoy, but im assuming u didnt. He was probably looking for visual confirmation. When he didnt see a hen he got a little jittery.the best thing to do if u dont have a decoy and a bird is hot but wont commit, is give him the silent treatment. Make him come looking. If you kept calling and he didnt see a hen, he got nervous. My advice, slip back to that spot, stake a hen decoy and when he gobbles at your calling, shut up. He will eventually come check u out, spy the hen and commit.