My ex and I broke up a month ago. He was the dumper. Since then we have hung out maybe 5-6 times, either solo or with friends. I'm having a birthday party next week with friends but this weekend is my actual birthday. I am going to go eat with my little sister and I invited my ex boyfriend to join us. He knows it will just be us three and he didn't decline. I know he doesn't want to be together right now. Is it weird that it will just be us 3? We didn't end in bad terms but I know it's no secret to him that I still have feelings for him.