Why do i still miss my ex?

You only dated a week and you are still bummed out about it. If you are clingy right at the beginning, that sends him a red flag that within time, you are only going to get worse. You have some serious insecurity issues that you need to solve if you are getting this emotionally attached to someone right off the bat. I know I would never date a clingy person. I had a life before them, and if he respected me, he would allow me to continue that life after starting a relationship with him. Most guys want a girl that will make time for them, but also make time for themselves. I like my personal space...time with friends, time to myself...and you should too!! It is not healthy to cling to a person and wanting to be with them all the time. So let this be a lesson to you and work on it before you go into your next relationship so you don't fall into the same pattern. Plus, how can you miss someone who treats you like S*it!