Dear Susan,
Alan may think he can flit from
womanWomen's way to
womanWomen's way with no consequence. He may have that
littleLittle noses decongestant
Little tummys insight.
He may indeed have no inkling that his behavior hurt you. After all, HE doesn't feel things so deeply!
If you were to remain "friends" you'd be a-waiting, and he'd be away most of the time, unless he felt like it, and then he'd come back and then disappear again to her, breaking your heart once once more.
Otherwise, I think I've addressed your questions in this morning's post.
Sincerely,
Dr. P.