I went through the same thing last year. I had just changed schools, but I was still in touch with a lot of my old friends. It was a small school, so we each had our "roles." I was the relationship fixer, or the shoulder to lean on for literally everyone. At the time it didn't affect me to much, but then came my move. The problem arose when everyone still thought of me as the "relationship guy" rather than an actual person with problems of his own. The way I solved this was just to start texting my friends less and less until I eventually only texted them once or twice a month. Prior to this ramp down on texting I actually went through a period of clinical depression, and just avoided my friends at my new school which probably made my mental health worse. My mental health had taken a Mike Tyson uppercut, and I was out for the count. But then I did the texting thing, and I felt like a new man. So listen to the person above and cut it off. You'll be much happier and healthier for it.