Depression and paranoia from heavily smoking weed

I am 19 years old and I have been smoking weed since I was just turned 14. At first I smoked everynow and then and i used to take month breaks because i would constantly be questioning myself what am I doing? It got to around being 16 when i first experienced my first intake of MDMA and pills. It changed everything for me and turned me into a whole other person, it seemed like i found out the meaning of life, found my inner peace and opened my mind, ever since then i have been a positive and happy person, enjoying the little things in life and enjoying my long term relationship more than ever before. However the last 2 years I have been smoking weed with probably not longer than a week break at times, I love weed and it is a huge part of my lifestyle and who i am today but lately over the past 6 months, weed has relaxed me so much that i hate to conflict with people and always seem like a pushover because the arguments is too much stress for me, me and my friends have slightly parted and things have changed, whenever i'm high i constantly think about if it was my fault and constantly questioning myself like am i boring and becoming really paranoid with the way i look and my personality and becoming slightly depressed at times, and this is unusual because a year ago i did not give a sh*t about these sorts of things. My girlfriend knows i smoke bud but doesnt know the ridiculous amounts i smoke so i feel schizophrenic at times in the sense that i live two lives, with my girlfriend being sober and the other half being stoned all the time. (I never see my girlfriend stoned) I'm slightly becoming really unconfident with myself the way i am and the way i act, always being conscious of what i do know even with the closest of friends, but i only feel like this when I am stoned. I know the right answer is to give up weed but it is such a big part of my life where i barely would see my friends anymore cause all we do is smoke weed together, i mean i know i need to give up but i love weed too much to give up and question is it just because i'm going through a young phase in my life where i'll eventually grow out of. Does anybody have any advice or experience in feeling this way and what they eventually did with there lives or what to do?