Is answering a guys dm’s cheating?

So I get dm’s by many guys but like I reply sometimes to the non-sexual ones. I have a boyfriend for 4 years (but we are a secret), but it’s interesting to talk to these people and they honestly want to get to know me. Most of these guys go to my college, but I don’t know them very well, so I feel bad not replying to them. Most girls don’t dm me and want to know about him. Is it ok to reply to them or is that cheating?
Is answering a guys dm’s cheating?
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