Your eloquent words show that you don't like being with this man now, because you think he is ugly and looks fat, so you start to ignore her. But this man is still very enthusiastic, pretending not to know your psychological changes.
In fact, whether you love this man now or not, you have always loved him. So, if you love him, don't hurt him. If you want to compromise yourself and accommodate this relationship, cut the gordian knot quickly and leave no room for others to misjudge. Only in this way can the other party know that you want to live, and he can't give it at all, so he will shrink back.
The longer this kind of thing is put off, the deeper it hurts. Therefore, it is better to explicitly refuse the suggestion. Of course, before you make a decision to break up, you'd better ask yourself if it is necessary to continue making a decision so as not to regret it after losing it.