You could lead with something nice and then deliver the news like, “I think you're really nice, but I just don't see us being together.” You could also give a clear and direct no and say something like, “I'm not interested in a relationship right now.”
If you see the girl in common places and she won't leave you alone, just stop talking to her. Even telling her you aren't interested might keep her around because you're willing to talk to her. The next time you see her, brush her off completely by being silent.
How to reject someone who has a crush on you without hurting them?
Accept that they may be hurt.
In general, the best you can do is break things off as kindly and gently as possible." You can and should try to reject someone without hurting them by exercising kindness and thoughtfulness in the conversation, but after that, how they handle that rejection is up to them.
This is by far the most common reason why a girl would reject a guy she likes. You have to understand that throughout our lives, we will develop an attraction to the people we meet.
It's okay to gently say something like, "I'm sorry, but I'm not in love with you anymore. I need something different right now and I think we should go our separate ways." If it's a less serious relationship, you can keep the statement briefer. Something like, "Sorry, but I'm not feeling a significant spark between us.
Just keep it short and sweet and tell her that you don't return her feelings while leaving the message on a positive note. Here's what you can say: “I know that you like me, and I just wanted to tell you that I don't return your feelings. I hope you're doing well and that we can hang out soon.”
Make eye contact, stand up straight, and speak up when you talk. Most girls are attracted to confidence. Try your best to not lead a girl on if you don't want to pursue a relationship with her. Don't try to show that you like her (or dislike her) by being mean to her.
Briefly describe what happened that felt hurtful or disrespectful. Say, “When I was talking, you (said or did this).” Don't go into a long story about what occurred or try to soften the blow by saying you know they didn't mean to be offensive. One sentence that describes your experience of their behavior is enough.
She might be putting you in the friend zone because, for now, that's the only place where there's room. Take it as a compliment that she's not using you to get over another guy, and wants to keep you around. While all relationships take work, friendships are lower maintenance than relationship relationships.
You try to find excuses to spend time with them as well. And when you meet up, you will sense they have eyes and ears for you and you alone. They will take the lead to make plans with you. They will listen to all your stories no matter how long or boring or detailed they are.