being kind doesn't mean i like you

As a kind hearted gal, palagi nalang namimisinterpret yung pagiging "nice" ko into something like may gusto ko sakanila or may chance sila saken. I understand those people, I understand why.

So recently lang, my work crush approached me through chat. Syempre I entertained malamang krass ko eh, we became friends in just a few hours of talking. Not until I stalked his socmed and found out he has a gf. Red flag alert! I distanced myself. However si kuya mo ay panay chat parin at nag gogoodmorning pa nga lagi. I don't know, I don't wanna sound rude or what kasi naconsider ko na sya as a friend since then so nagrereply parin naman ako as cold as I can (kasi ang mga msgs nya ay mga tanong po at sinasagot ko lamang) and minsan pag hindi na replyable mga message nya ay siniseen ko nalang or react zoned ganon. He still keeps on chatting me. Ano gagawin ko? I don't wanna ruin their relationship. I don't wanna seem rude. Pero realtalk-in ko na ba mga pre?