I need advice

So Christmas is coming up and I really want to spend it with my son, however my baby dad (we ended on good terms and he’s been helping me with what my ex did to me) said for me to spend time with him and his family as they didn’t want to see me alone on Christmas BUT my ex who wants me back, he wants me to spend Christmas with him and if I don’t he’ll walk away, I’ve probably explained it badly but I don’t know what to do, I know I want to spend Christmas with my son but I’ll lose my ex that I’m still in love with but then if he loved me he wouldn’t be threatening this would he?