Isn't this a form of cheating or not?

So my boyfriend was messaging other females calling them gorgeous saying how he wants to get to know them and take them out on dates. I just found out when I see a message on Facebook with the person responding after he deleted all the messages saying she was free next weekend and I messaged her and she screenshot all their messages and sent it to me, I then had her message him again asking to hangout sooner and he said yeah and after that she blocked him.

Isn't this a form of cheating or not?
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