Advice please

So my ex and I broke up like 5 months ago. And he got a gf 3 months ago and I still love him it hurts that he has a new gf but he said he still has feelings for me but we weren’t talking a month ago and just recently started talking again cause it hurt talking to him and he wants to be friends but it’s so hard for me to be friends with him cause I still love him and the conversations aren’t the same anymore he’s changed so much and Idk what to do can someone please give me some advice