What is his snap score keeps going up but not replying?

If someone's Snapchat score is increasing but they are not responding to your messages, it could mean a few different things:

1. Active Usage Elsewhere: They might be actively using Snapchat but not engaging with your messages. For example, they could be sending snaps to other friends, adding to their story, or viewing others' stories and content, all of which contribute to an increase in their score.

2. Notifications and Priorities: They might have seen your message notification but haven't had the chance or priority to open and reply. People often manage multiple conversations and might prioritize some over others based on various factors.

3. Busy Schedule: They could simply be busy and have quickly interacted with Snapchat without taking the time to sit down and reply to messages, intending to get back to them later.

4. Technical or Notification Issues: There might be technical issues causing a delay in notifications or responses, though this is less common.

5. Interest or Relationship Dynamics: They might be choosing not to reply for personal reasons, which could relate to their level of interest or the dynamics of your relationship with them.

It's important to communicate openly and directly if you're concerned about the dynamics of your interactions, rather than relying solely on interpretations of social media activity.