What must I do to make my boyfriend feel comfortable in our relationship? How to make him enjoy to be in love with me?

You can't make him do anything, specifically when it comes to emotional feelings. Why doesn't he feel comfortable around you? Why doesn't he enjoy loving you? Ask yourself, or him these questions and go from there. Work on what's wrong, or leave the relationship because if he isn't comfortable around you or enjoys loving you and there's no explanation, then that just means he doesn't want to be with you and is hoping you get the hint.