Can I not be happy

So this is going to be long but I guess it is needed to fully understand. My ex-husband and I have had issues for years. Last Novemeber I finally had enough and said I think its time we split and you focus on yourself and getting help for the issues you face. (He has a porn addiction) This is an addiction that ruined all trust between us for years I begged him to stop because I had so many issues with my self worth and looks. He said he would then he would just get caught doing it again. There was other issues in our relationship varying from not being home with the family(we have 2 childen...one having sensory processing disorder and needs a lot of care), not showing he was really ready to step up and take over being a dad, not being an active listner in our relationship. For years I asked for therapy he would go for one or two sessions and then say he was fixed... Well he was not fixed. I ended up meeting someone who I have had a great connection with. We both have had a lot of the same issues with our previous partners and we both have the same ideals on what a blended family should be. We just fit the way partners should. My ex and this man have met. Both are nice to eachother. This man has even helped my ex with some issues car and other repairs that needed done. Well recently they both were invited to a wedding of my families. My ex came with me and our children first and this new man came about 2 hours later. We avoid showing affection to eachother in front of my ex to prevent hurt feelings. This was the first time this new man was meeting my extended family. He has meet my cousins and siblings and mother and father. My ex left early with our son because he was being overwhelmed and my daughter stayed with me and the new man. Well a few days later I was told by a family memeber that I made people feel uncomfortable with them both being there and those thoughts and negitivity would be projected on my children. Even thought my mom and step dad have both been at family functions with their new partners... I had even caught my own mother saying I would never bring a new man around my ex when she has done it. I am so upset with the judgement because with this person I have finally found a happiness that I was missing for so long. I am a natural people pleaser so it makes me want to just give up on my happiness to make everyone else happy.