<human>: I met this guy about a year ago and we have been friends since. I'm 30, he's 38.

We used to hang out a lot, just the two of us, then it started to slow when he started having work issues and admitted to being depressed. I was supportive and he said he appreciated it.

He has had to move back to the UK for a few months for work and I asked if he wanted to stay in touch ... he said yes. (He's not dating anyone.)

He always reads my messages as soon as he receives them and usually responds immediately or within a day. The problem is, he only responds about 80 percent of the time and I'm always the one initiating conversations. I'm trying to be flirty, but he's not really picking up on that. He continues to say he's depressed.

Should I just let it go? Did he stick me in the friend zone and doesn't want to talk anymore? Or is he just being British? Help!

[Thank you sooooo much in advance]

Give me the gist of the text in a nutshell
<bot>: How do I know if I should move forward with a relationship or friendship when I'm not getting any signals from him? Is he being British or not interested? Does he even want to be friends?