Not everyone who enters your life is meant to stay in it. People often get wrapped up in the idea that everyone is going to treat them the same way they treat others. However, more times than not this isn't the case. Not everyone has the same heart as you do, and as heartbreaking, as this is, it's the truth, and you have to accept it as it is.
Toxic Friendships
People often use the length of time they've been friends with a person as a way to determine the "strength" of their friendship. However, it doesn't matter whether you've been friends with that person for 14 years or 14 days, if that person's friendship is poisonous to your growth you need to cut them out. Friends are meant to encourage each other to reach their full potential, and to boost each other's self-esteem. Friendship isn't supposed to be based on owing each other favors, getting jealous over each other's successes or only being around when that person needs someone to talk to. Although lending a listening ear, and a shoulder to cry on is a part of being friends, that person shouldn't only reach out to you when they're having a bad day. Friends are supposed to be around throughout the good times and the bad.
There comes a time when you have to take a step back and look at the larger picture, is this friendship worth salvaging? If you have to take the time to contemplate this question, you probably already know the answer.
Toxic Relationships
Sometimes you have to just accept that it's never going to be you. You're never going to be that person's first choice or even their second. They only want you when they're lonely or sad because they know you're always going to be there. Even though you'd do anything to put a smile on their face, there comes a point where you need to look at the mark it's leaving on you. It's not healthy to allow a person to play with your mind and your emotions just because they're unsure of their own. You deserve someone who will make you a priority rather than treat you like an option.
You need to choose what's best for you. Don't be afraid to cut off the toxic people in your life, let them go. Never settle for less than your worth, because you're worth it.