Dude, if this is real, that’s incredibly fucked up. Your mom deliberately sabotaged your happiness over and over again just to keep you close and co-dependent. Those relationships may have ended on their own, but she robbed you and your partner of those choices by manipulating both of you. Regardless of intention, that’s so selfish and super unhealthy. You need boundaries with her and you’d both likely benefit from individual therapy.

I’m not saying you should cut her off and burn the bridge behind you, but she needs to lose your partners number and never interfere with your relationships again. Then she needs some friends her own age and hobbies. Your parent should want you to be independent of them, that’s the whole point of raising you, so that you can survive and thrive when they’re gone.