I sometimes cry over my best friend when thinking about them
Do you know why you cry about them?
I just try to remember them and I get really emotional
It is good to be emotionally connected to your friends. If you feel sad about them you might feel better calling them or texting.
Nah, I'm going to cry about them for a week then get over it.
I think it's wonderful that you have a friend that you genuinely care about and I'd suggest making efforts to maintain that relationship. Feeling close to someone is healthy and is part of being supportive and supported.