How to Release Bottled Up Feelings

i constantly bottle up things inside and it is not doing good for me right now. i get agressive sometimes and say things i later feel guilty for. i was raised around agressivness and i am becoming like my family. our fasmily have been highly stressed this year. and i am constantly bottling up things and i feel i am going down a path i don't want to go on. when i get aggressive i am highly angered and i will usually hit but then i feel really guilty afterwards. i usually feel really numb and have felt numb for a while. and when everything comes out i feel really sad or angry and am very moody with my family then bickering goes on for a while. i usually go numb for a while and then i become depresed and angry. is there any advice that will help me with not bottling things up?