Deleting Facebook friends question?

[BRi]

I recently graduated college and started my first job. Now in college I was all about Facebook and had over 500 friends (I know, not a lot), but lately when I went on it my news feed annoyed me and it made me feel nervous that people I'd never hear from again were creeping on my page. So I deleted friends off of my Facebook. Now I'm well under 100 friends. After I did this, I literally have been experiencing anxiety attacks. I know that I'll never speak to those people again, so why do I feel like this? Also, I'm a 21 year old girl. Was it normal for me to want to keep my Facebook private and only for my family and actual friends? (Not friends of friends or acquaintances.) My boyfriend was teasing me that his 60 year old father had more friends than me. It made me very upset, even though I know that my real friends are the only ones that write me on there anyway.