We have all had friendships that had its run and one day become a memory in your life. Whether it's your friend in kindergarten who picked on little Timmy and you didn't like that, to your college pal who talked about too many of her "friends" to a point it made you question if she does the same about you vice versa... it's ok to not be friends with someone and here's why.
Morals that do not have a common denominator.
If you and your friend do not have common morals, there are many things you probably do not agree with that they do. Drugs, lying, cheating, and stealing could be some habits and addictions that your friend dips into but you do not and that could cause a big strain on the relationship. If this relates to you, remember what the big man upstairs says " Bad Company ruins Good Morals".
If gossip is a hobby for them and not you
There's always that one person who feels the need to talk about everyone around them to make he/she feel better about their life. Whether it's making fun of someone, or how skinny/fat they are, or what they look like.. you can't escape these types. But you can escape being friends with them. If your friends with someone who lacks empathy and thinks by downing someone else will bring them up, and you feel uncomfortable with it, It doesn't matter how popular everyone may think they are, you don't want to be friends with a bully and that's OK!
Different personalities
I know I know... but "opposites attract!"... not always! If you have a bubbly and outgoing personality that's inviting and warm and your friend is the polar opposite, that could sometimes be a perfect combination but not always. It could actually be a drag. Personalities collide at times and It's ok to hang out with someone who has the same interests and the same type of fun as you and it's ok to make new friends!
They are more of a frenemy
If you have a friend who always puts you down, is that a friend or actually your enemy? There is a difference between tough love and just being flat out mean. Your friends are supposed to be your hype men and your motivators. If 9/10 times they discourage you, they are your frenemy. IT'S OK TO LET GO OF THIS FRIENDSHIP. What's the point anyways? Why be friends with someone who makes you question every little thing about yourself. That's exhausting and not worth your time!