<human>: Can you condense the text into three sentences or less?

I had a 2 year on and off relationship. In the last 2 months of the relationship sex was getting scarse,oral sex non existant (even though she knew i love it),  and other little things caught my attention ( i cant really be specific, but little things that showed her attitude towards me had changed). Also she told me she ''wanted space for herself'' (in my counrty this is a cliche dump line), without actually dumping me in the end

Anyway, i learned from a reliable source (not actually witnessing this) that she had a crush to someone else, while she was with me, but things didnt work out the way she wanted so she decided not to mention this thing.That period was the same when her attitude changed.

Thats how much i learned, not exact details, but serious hints there may be infidelity on her part.In the end, she swore to me she only talked to him.Anyway, i decided to end the relationship, while she begged me to stay, saying she had done nothing wrong
<bot>: I learned she was hitting on another man, i dumped her. Is flirting with someone outside the relationship considered cheating?