Would you be bothered?

This is sad to say but I feel like my bf is losing interest. He seems distant and texts me very “dry.

We’ve been together about 3 years and since we are very busy texting is our biggest way of communication.

Around 7-8pm, I’ve noticed he takes a while to text me back. He’s usually quick to text me back unless he’s at work he will take like 1 hour to reply. I know 1 hour is not much but he is usually quick to answer me back.

Well the last text he sent me was 7:38pm. It’s 9:28 and he hasn’t texted me back. I saw he was active on Facebook.

Don’t know if this is normal or I’m over reacting. Just makes me uneasy