Need advice

Okay I want some honest advice: So I was engaged to a boy I've known for 11years now, I am 20 now and he's 23 okay so I've called off the engagement in September sometime due to harassment/stress/sorts of abuse and more...now I'm happily in a relationship with a boy I've been knowing since 9th grade which is 7 years now and well we are moving in the right directions so when me and my ex fiancé was dating my mom wanted us apart she would say hurtful things telling me I'm stupid for being with him and that he don't love me he cheating on me etc(which in reality he was cheating on me) he bought his gf to my job after I broke up with him I had to put a restraining order on him) but anyways yes so now that I've found somebody new now she's telling me everything my ex doing saying she's happy he's going somewhere with his music and that she's proud of him this and that like when I was dating him she hated him now that I'm dating someone else she loves him and thinks he's doing good in life and now that me and my bf are moving in our own place soon everything is god won't be pleased with me or that it's not good to be shacking up this and that now that I'm officially happy like what exactly do I do in this matter like I'm happy so what's really the problem with me moving Idk 😔