Any tips on how to get my toddler adjusted to moving apart from his dad?

Me and my sons dad broke up when he was only a few months old because he was a cheater and i wont stand by that. Well my son is 2 1/2yrs old now and we both have significant others weve been dating for awhile im planning to move in with my boyfriend of a year and a half. He has a nice house, backyard. My babydad said hes getting an apartment with his girlfriend.

My only concern is how my son will react to this change. Weve been living together this whole time because we were either stuck on a lease we couldnt afford to break or because we thought it would be best for him. Well its been nothing but hell of course.

My son is comfortable with my serious boyfriend. My bf treats him well. Ive taken my son to his house to get him used to it and he loves his dogs and fish and loves to play in the yard. Ive had him sleep with me there too before to see if he was okay. And he didnt cry once the entire time or any time hes been there (he cries with his dad a lot)

Is there an easy way to get a toddler adjusted to a change like this? Where mommy and daddy wont be in the same area anymore? His dad is very disrespectful towards me and everything and so we barely talk. I tell him not to talk to me unless its about our son. Because otherwise he lies, curses at me, or calls me names.

I need help! Tips! Advice, or anything really. I want a smooth transition with my son. He probably wont remember when he gets older. But i want him to have the most positive experience. He talks but not in complete sentences yet. Hes a smart baby tho and hes already learning how to read words. But ik he’ll subconsciously be affected.

Should i tell him were moving? He wont understand. Idk what i can do. Ill be bringing most of his toys and things with me. And we’ll split his stuff, but still.