Answers please! What would u think of this situation>>>!>?

Ok my ex and his gf had been together for almost a year. They had a really bad break up. I guess he needed a friend. He consulted me. We met up at Dennys and talked for a while. I ended up gettin a room and we had . He told his gf about what happened and that he regretted it. His girlfriend told him to text me and tell him that they are back together and that he would appreciate if i wouldnt txt him anymore, and he did so. He told his gf that what we did didnt mean anythin. He wasnt tryin to get back with her because he knew what he done was wrong. His gf took him back, and he is happy. He said that he is going to get married to her. What do u guys think of this> Is this considered cheating? Could he possibly be n love with her?