what does it mean when he says he doesn't want to break up but he is not sure if he loves you anymore?

It means (in my experience) that he has mixed feelings about you and can't make up his mind. He also maybe be considering whats best for himself or you.

leave what he wants and doesn't want, if you want to solve ur problem then ask yourself that what you want.

It means that he is experiencing conflict in where he isn't sure if his feelings for you are as strong but this doubt does not override his attachment to the relationship. And so he does not want to break up in case he regrets it and lose something valuable. Perhaps both of you two should take a break to sort out where you both stand.

It means that he likes what you are doing, but he just doesn't feel the chemistry anymore. He is comfortable, but not crazy about you.

It can mean several things. The person may be afraid of being alone. The person may be afraid to break the relationship with the other person. Fear that the person wants him. It may mean that the person is afraid to make a choice. Or perhaps the opposite, afraid of hurting the other person.

It means that he probably doesn't know what he wants at that exact moment. Give him some time to think about it and tell him that you want to know if he wants to continue having a relationship or if he wants to end it, because if he keeps you on a leash you will end up more broken then you should be.

This could very well mean that he is afraid he's missing out on the single life. He may feel there are places to go and people to see, and he's concerned about being committed to one person in one place. Hey may need time on his own to figure this out. If you love him, give him that time. If you cannot tolerate the idea of him seeing another person while you're on a break, tell him so. It's always best to let a person know how you feel and where they stand.

His feelings has changed but he is scared to move on. He is comfortable in the current relationship.

My guess is that what he's really saying is he's concerned about your wellbeing, but really isn't feeling what he used to feel. He cares about you deeply, but just can't feel the way you need him to feel. It's tough, but it's better than some alternatives. He cares. He wants to know you're going to be okay.

He is confused. Try to give him space. Call it a break but not break up. If he seems to enjoy not being by your side and then let him go and be understanding evem if it hurts.