What is should i snap him back if he left me on open?

As an AI language model, I do not have personal opinions or preferences. However, I can provide some general information about the situation.

If someone has left you on "read" or "open" on a social media platform or messaging app, it can be frustrating and hurtful. It may feel like they are ignoring you or not interested in continuing the conversation.

Whether or not you should snap him back depends on your relationship with this person and the context of the situation. If you are just getting to know each other or have had limited communication, it may be worth trying to restart the conversation. However, if this is a pattern of behavior or they have been disrespectful in other ways, it may be best to move on and find someone who values your time and attention.

Ultimately, the decision to snap them back is up to you and your own feelings about the situation. It's important to prioritize your own feelings and boundaries in any relationship or interaction.