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 that you have to give him some space to think about his priorities. If his priority isn't your relationship, you probably should take a break and see what happens from then on

It means that he does not take your relationship seriously. I mean it depends how long this relationship lasts, but in most cases it's possibly because he doesn't want to be alone and he's just waiting to find another partner. Life is brutal, unfortunately.

Firstly I'm so sorry to hear you're going through such a tough time. From my personal experience it sounds like your partner is confused, perhaps there is a lot going on in his life and it is making him unsure about what he wants, doesn't want and what makes him happy in general. It sounds like the best thing you can do right now is make your feelings for him known and be there for him as he tries to confirm how he feels.

You have to understand the situation and talk to him about this. He loves you and don't want to leave you. May be he is going through some kind of problem or may be you need to make some changes in your relationship. Give some time and ask him is there anything in our relationship that is annoying him so that you can change it. Sometimes there is something that a guy can't talk about because he thinks it would hurt your feelings and that's what creats a gap or a problem in relation. You need to discuss and give him some time and for sometime go according to his way.

It may mean that he is too lonely to be out of a relationship, sometimes it's comforting for people to want to be in a relationship when they don't love someone.

It means like he doesn't want to end the relationship between you two but he kind lost the feelings for you

Generally, assume that people mean exactly what they say - he isn't sure if he loves you, but he doesn't want to break up. I would think that maybe this means that he wants to be honest with you about how he is feeling, but he wants to try and work through his feelings and be sure he really understands them before deciding to break up.

he cares about you enough so he doesn´t want to hurt you by breaking up but may be the love is over for him

He do not want to lose you like a person. Maybe you he can get his feelings back to you. You mean a lot in his life

When we do something for a long time,it will become a habit of us.. It will be hard for us to let it go.. Maybe for him,he is confused and unsure about the love but feels insecure and guilty of breaking up..