dealing with emotional instability & anixiety

so many of you may not know that i suffer from severe emotional instability and anxiety also lots of depression issues... i have been struggling with this for most of my adult life.  on the outside i may appear like a normal 30 yr old but inside i'm extremely emotionally immature its very easy to make me cry.. i also get emotionally overwhelmed in situations were others wouldn't. I constantly feel like i'm gunna fuck everything up in my life.. crying is an almost daily thing for me.. although over the past year or 2 it's not as bad...i over react to things i shouldn't and sometimes lash out at the people i love the most and say things i don't mean.. which is the part i feel horrible about.. i am working in therapy on ways to better deal with this because the last thing i wanna do is hurt those that i love.... it is a struggle but i feel that everyday it gets a little easier and i have learned ways to calm myself down when i feel myself loosing it.. my therapist also wants to help me figure out WHY i act out.. and i think a lot has to do with the fact that a had a father wh basically was NEVER there for me growing up and  emotionally... and still isn't.. there's also gotta be other reasons y which i'm sure will be uncovered in time.. i just want to fix this part of myself i HATE that i act out.... i need to get a better handle on this part of myself.. i'm just thankful for the support of my boyfriend and my friends & family who i know wouldn't judge me or leave my side ever. and for this i am very thankful <3