Doesn't feel like home...

I lived with my ex bf for so long that now that i moved back to my parents house i feel so weird & it doesn't feel like home i miss home with him. Every time i come back to my parents from sleeping over his house i feel sad & out of place & it sucks that i get into this depressing mood. I don't know what to do with myself most of the time because i don't have anyone to talk to & i wish i can talk to my mom about these things but i can't because i just can't bring myself to talk to her about it..