If the two of you are true friends, you will be able to stay friends no matter what happens. I am going through the same thing right now. I know that it can be hard, but if you keep yourself in the girl's life, she may just realize how good of a catch you are. Don't loose hope
The problem is that you are still placing your need for a relationship with her over any real friendship that is between you. Being with her will be a constant reminder of what you want and can't have, especially as you see her get involved with other guys. You'll feel resentment as you watch her date other guys, and worse, if she confides in you about her relationship with someone else.
If she only wants a friendship, make your words and actions reflect that. Treat her as you would any male buddy---no cuddling or hugging, no gifts, no dates (you both pay your share if you go out to eat, etc.), no long phone calls, no sleepovers. If she questions this, remind her that she only wanted a friend, and that is what you are from now on. A friend, nothing more.
It may actually be better to tone down the friendship for now, which will help you to grow away from your current feelings and ready yourself for future relationships with women who actually want relationships with you. It doesn't mean that you hate your friend for being honest with you or ignore her, but that you stop focusing on someone who doesn't reciprocate your feelings.
This question kind of reminds me of the same situation that I am in, except, I'm in love but aren't close friends with my guy friend because I was too shy to talk to him when I was back in my first year of high school. The only thing I would suggest is that you can keep staying close friends with her and wait for her until she's married as I am waiting for him until he's married. The only good thing for your situation while the only bad thing about my situation is that it's good how you're close friends with her so you can try and get as close to her as possible and see if she will soon have feelings for you too while it hurts for me how I have to cope with it without any luck. However, if you claim that you only "like" her, maybe because you've fallen out of love with her for another girl, then your lust feelings for her will soon turn into having no feelings for her at all anymore unlike the feelings of love for a particular one because you will never fall out of love if you're truly in love with someone. So in this case, you should forget about relationships until you believe that it's love. Therefore, staying friends with her should be an easy thing to do then, unlike me, how it's hard to keep being friends with my guy who I love.
In order to fall out of love with your best friend while keeping your feelings in check would, you would probably need to limit your time spent with him/her. This will help the two of you continue to be friends. Also, you should be very open and honest with your feelings as to not lead him/her on.
You can definitely tell you best friend that you have feelings for them and that is why you can't be friends anymore.
If you really liked them as a friend, just tell them the truth, that you only like them as a friend. And tell them you still want to be friends with them.
Do you have a reason for not wanting to be best friends anymore? Has she done any thing to upset you or make you angry? If she has then you should tell her that this is the reason for no longer wanting to be friends, if not and you are just bored of her then that's mean. You shouldn't tell her that, you should gradually just spend less time with her so that she doesn't get too upset.
then maybe you should be just friends
does your friend's girlfriend have feelings for you too? and you need to figure out which is more important to you, your friend and your current girlfriend? or your friend's girlfriend... i can't help you that much sorry :(
If she is really your best friend she will continue to be your best friend, no matter who you are dating.
Everyone in this earth requires a friend to share his or her feelings
Respect her feelings. Just leave her at that level. Tell her you just want to be friends.
if you feel lonely and feel like theres something missing in your life, you are feeling the need of a friend.... (friends make a huge part of our life!!! & if u dont have one u r definitely missing out some good parts of life!!!)
Introduce them to your friends
if your friend is the opposite gender than you, you might have feelings for them.