Need your opinion - Am friends with a married man whom I met online

He has conditions about me texting him - should correspond only during working hours on weekdays. That too he is often busy with work. No messages once he reaches home - if is not like I send anything obscene, just normal conversation. Even if I send him a text in the evening he will not reply.
Strictly no texting during weekends.
He went on a 3-week vacation to visit his daughter in Singapore. Absolutely no contact.

Would you continue with such a “friendship” or drop it? He’s afraid of hurting his wife - that’s why all these “rules”. I’m not even his lover, just a friend. Is it worth it? Am I losing my self respect?

What would you’ll do?