So I've been having conversations with a guy I used to know from work. (We don't work together anymore and even when we did we worked in very different area's of a pretty big company)

We're platonic, perhaps a bit playful but not flirty.

We were having intense conversations (think daily updates throughout the day) for a few months before he told me he's actually in a relationship and assumed I knew.. - I had known at some point (They must be together for over 6 years at least) but since he doesn't show anything on his social media, doesn't have relationship status, doesn't talk about her - even though we talk throughout the day - and we didn't have much contact for a long period I assumed at some point it had ended before we started talking. (he has a very big bachelor-vibe)

So here's my dilemma.

I don't know if it's still appropriate to have this amount of conversation with him. - he thinks it is -

I don't have feelings for him, but he's actually good for me right now. I've been through a lot and I don't expect to be respected (Think amotional and physical abuse for over 15 years). He does respect me and it's so refreshing. He reassures me and is kind. His behavior is the absolute bare minimum of what I should be expecting in a relationship and I should grow accustom to it and demand at least that from a potential future partner. I'm not idealizing him and I don't seek a relationship - other than friendship - with him and I think being in contact with him is good for my mental health?

My friend, however, said it's a red flag that he doesn't show his relationship status on his profiles. I don't really.. care.. is maybe the wrong word, but that isn't my relationship and I'm not interested in him that way. I think that he and his girlfriend should set boundaries of what is and what isn't appropriate in their relationship. I told him that I don't think I would be comfortable if my boyfriend would talk to another woman the way he does and he told me not to worry about it and it was fine.

I assume that since he talked about his girlfriend the way he did, he's also not interested in me that way either.

So... would it make me a bad person to keep talking with him?