You basically are answering your own question. You can't handle being her friend. It's time to move on. If you are okay with a friendship you should tell her directly that you need your feelings to calm down so you need some time in separation. Or if you think you won't be fine with that, just break the contact altogether. Of course, if you do, you should tell her and not just disappear. She may not feel about you they way you feel about her, but from what you write, she did nothing wrong, so she does not deserve bad treatment. Good luck!

Grow up and move on and don't be creepy. Accept the fact she's just not that into you romantically. It may be also that she cherishes the friendship and doesn't want to ruin it with a romantic relationship.

You need to tell her the truth: how much in love with her you are, how much it's hurting you to see her with boyfriends and that you don't feel that there's anything else you can do than to end the friendship.

Tell her how you feel about her. If she reciprocates, great. But if she doesn’t and dates other people that’s your ticket out. Let her know that you appreciate her being her friend but you may have to go no contact for a while so you can separate your feelings of love for her and heal and move on. I’m sure she’ll understand. Feel your feelings because they’re totally valid. You’re not an “incel” for having feelings. Once you heal and move on, then you can find someone who can appreciate all you have to offer. Sometimes, the people we like don’t like us back. But that doesn’t mean there’s not someone out there who won’t reciprocate. You just gotta knock on many doors until one of them opens. Don’t give up hope.

Tell her you are interested in more than just friendship. If she says no, move on in life and find someone who does.