Is this what we call a rebound 'relationship' ?

Anonymous
so I met this guy one year ago, while we both were interested in each other, when I asked him his relationship status he was confused one time he said there is someone ( not a full-on relationship) then he changed and said his girlfriend... I knew something was wrong, I started psychoanalysing him. I could not understand whether he was in an open relationship or in denial. Someone confirmed me it's not an open relationship at least not from his side. He was surprised when I told him that he was having a hard time letting go of his ex who pushed him away and he hid that from his parents. I ran psychology sessions for him and did what I could to help him move on but he was too stubborn. He was not investing much, I was investing more giving him gifts, writing poems etc... Finally, after more than 1 year I wrote his mother and told her the truth and asked her to talk to her son. She brought him to reason and he broke down and pushed me away (because he is angry that I told his mother his secret). I told him to take his time and enjoy his life before going back to dating and if god wants us to be together we will meet again, then I left. Is this what you call a rebound relationship?
Is this what we call a rebound 'relationship' ?
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