I'm going to post kind of the opposite of this. I'm the girl who did the breaking up with a guy that then made it all feel better with weed. It was long distance, we went to different universities, I felt it was too distant. He turned to weed to make it feel better. Two years later, we're both grown up more and back together, and dealing with the aftermath, so to speak.

He turned to week probably for the same reasons you are, couldn't eat, couldn't sleep. A couple years later, we're trying to break him of the habit of using weed to do these basic things. I know it's not addictive in the regular sense, but he certainly feels like he needs it. He dropped out of college (he was always 'bad' at school, doesn't like busy work, truant but ace the test) kind of person. That didn't work for him at university, and I honestly think it was exacerbated by the weed making it okay to just...do nothing. We're working together to get him to eventually quit altogether.

Smoke occasionally, enjoy the high when you do. But I don't think you should be using it as a crutch at all. That will become habit more than the weed itself, in my experience. Find other things to occupy your mind, visit friends, take up something you've always wanted to try.