You've come to a point where you ask yourself, how do I get this girl off my back? It was fun while it lasted and now you are ready to move on, but she is not, quite the opposite, she is ready to take it to the next level.
The next level means - Emotions
She is getting emotional and before this escalates, you want to stop it here. How do you do it? I will teach you. These are the things you need to do to get this girl off your back without hurting her.
Ghosting is the most effective way to slowly give messages to another person that you are not willing to go to the next step or continue with whatever is going on. Warning. some girls after a week or so will be persistent and may not give up. You must remain strong and ignore the texts and emails or whatever communications. After a while, she will take the hint
If you are at a level in the relationship where you can be honest and transparent. The best thing to do is to be honest and say "Look, I had fun and I enjoyed our time together but I am just not ready to continue with this relationship because I am unable to make a commitment. Rather than ignoring and hurting your feelings, I want to be honest with you." If she is matured, she will handle it pretty well. If you are dealing with someone who is immature, you may get push back. No worries, this is expected. However, you must stick to you guns and be consistent that this is the path you want to take and end the relationship here and now and you are ready to move on.
You might think that the easiest way to get a girl off your back is to just lie about it because that way no one gets hurt. I would strongly advice you against that. However, there are certain circumstances where its necessary for your safety or her safety to not tell the truth. An example would be if the girl is not emotionally or mentally stable. In these cases, its best to not tell the whole truth. If you have to lie, don't make her the victim, instead, be sure to put all the fault on you. This is where you have to show you are strong and be able to be a man and handle it like a man. For example, you can say something you have that she doesn't like. Lets say she is not into guys that smoke. You can say. "I messed up, I started smoking and I know smoking is something that you hate but I am not willing to give it up at this time. I ask you to please give me some time while I over come these weakness in me. I need some space to be able to handle it on my own"
Every situation is different and you may have to get creative. There are a lot of ways you can do it but these are the best and most effective ways where you have a difficult situation and you want a positive result without the drama. I wish you good luck and I hope that you are conscious of what you are doing because after you start this, there is no turning back and you must follow through until the end so be sure and 100% certain that this is the road you want to take.
My advice is if you are confused, to just be honest and say, you need a little bit of space and time to think about something you need to figure out. Most girls will give you that space. Try it.