First time(Day 14) - Going through a break up

Hey everyone! This is my first time posting on this forum. Little about me, I am a 24 year old finishing my last two years of Engineering Degree at a University. I am 4 years behind in school. Recently my girlfriend, age 23, broke up with me. We had been dating for 2 and half years. Sex was great. We used to have it 10 times a week and it was heaven on earth. Even with all that sex, I still found myself masturbating to porn everyday specially if I didn't see her. Later I moved away from her for school, then when shit really hit the fan. We didn't see as much anymore, I found myself masturbating 4-5 times a day. It got so bad to a point, I sometime would masturbate at work's bathroom. And when I did see her, I would always want to have sex, every minute we were together. Everything I planned with her was based around sex, hotels, car sex. I came to realize that I was with her just for sex. And my brain tricked me into thinking I was in love with her, in reality all I wanted was sex I think she started to get a hint of my obsession and she broke it off with me. It hurt. Because if I wasn't so obsessed with my sexual release, I might have really got to know this person and had a meaningful relationship with her. Right now we have been broken off for about a month and a half. During the first few weeks, I masturbated everyday 5-6 times a day thinking about her or with porn. I have come to realization that sexual release is my reaction to anything stressful emotions, school, work..anything stressful. One day I just felt pathetic. And I decided to look this up and I ran into this community. I tried to get my shit under control. Today I am on day 14. Feel like absolute shit. Feeling anxious about life, about falling behind in school and career, about having gain 40 pounds in the last few years, about my girlfriend leaving me. I have been feeling kinda worthless. But it comes and goes. Its a f**ing roller coaster. I joined a gym, I have been keeping up with assignments in school, but once everything is done, I feel so shitty and ALL my urges come back. But I fight it off. Every time I miss my gf, I get crazy horny and every time i get crazy horny I seem to miss her. And not getting that release makes me even more depressed. I am having withdrawals from sex and masturbation while having to face my life and go through a breakup. With the support of this forum I really want to make it 90 days on my first try. Or at least 30. But really want to make it 90 so I can prove myself. Anyone going through something similar? Breakup+NoFap? I need some advise on handling this floods of emotions.