Overbearing people

So my ex and I didn’t put a label on what we are - I tell my close circle of people “ wherever the wind takes us “. We both do not mind at all whatever we are. So the only problem is I expressed to him that in the future I want us to rekindle our relationship - he does as well but he doesn’t really have the support he wants from my two cousins who are his best fiends and his mom who all of sudden dislikes me when she LOVEDDDDDDDD me before, even during the 5 year break up/friendship her son and I had. She disliked me honestly over something that I think is super petty but whatevs. My question to you ladies is .. What do you think? Would you care if they’re on board or not? Would you be with someone if their support system didn’t support you two?