 I want to give some examples:

\-  I stalk other people's Facebook accounts (even those that I know hate me) to see if they talk about me. If they do, I will feel depressed for the entire day. If they do not, I will be happy for the rest of the day. I might even laugh at them for their failures

\- I type my name on google search to see if anyone is talking about me

\- A very specific example. I am applying to some PhD programs this year. As you may know, it is not advisable for the applicants to read the letter of his recommenders. Some schools might even reject the applicants right away if they do this. Yet I still did it.

I don't know how to fix this. Is it normal or some kind of mental issues (self-harm)?  I was on medication some times ago. The drug made me feel great, yet on occasions I still have the urge to stalk other people to see what they think about me.

Finding a hobby is not the solution. I do play some sports, but whenever we have a break, the first thing I do is to stalk other people on FB.

Thank you guys so much!