Feeling anxious and confused.

Sorry if this gets a little long or all over the place. I have a hard time organising thoughts.

So basically I have a friend who I only really see at his work place. I have feelings for him and he knows as I wrote him a letter and he wrote one back but it never came in the post. So we talked in person after he'd finished from work and he said that it would be better for us if we just remained friends because it was better to have a good friendship than try and force a relationship which neither of us are ready for and ruin what we have.

Which I totally agree with, I really enjoy spending time with him and talking to him.

My main anxiety issue at the moment is that I feel as if my really good moods are reliant on speaking to him or seeing him. Which I know is bad and I know I shouldn't be reliant on a singular person for my good moods; so in turn it makes me feel bad.

Now that summer is ramping up we are both getting busier with work so it's going to be harder for us to hang out after work or even on mutual days off.

I don't know if I should talk to him about this problem.

My other way of dealing with anxiety is to write mock letters to him (I've only given him the one). But I don't know if I should or when I would even write. (He's not so great at answering texts, that's why I wrote the letter in the first place)