As much as it pains me to say this, I believe that he has made a definitive decision to end the relationship. I'm certainly not privy to the details and dynamics of your shared relationship, but it appears that mutual dissatisfactions existed within... enough so that he has opted to terminate matters and move one.

Statistically speaking, many couples under age 30 exit relationships between 18 months to three years after they first begin. The heightened pleasurable emotions that existed when a relationship began subside within this time-frame. A person's true self appears (for better or worse), and problems with interpersonal conflict begin to surface... communication breaks down, unwillingness to compromise and empathize, and self-motivated pursuits usurp relationship boundaries.

I'm sincerely sorry for your loss. I'm certain that it pains you and that your world has become topsy-turvy. Moreover, it is exceedingly difficult to be witness to a lost partner moving on with their life, especially if it appears to be seemless and even joyful for them to be single again. It will certainly take time to heal from what must be like losing your partner in life.

The advice I would offer is to you is this... begin with acceptance that the relationship has ended. Seek comfort with friends and family, familiar places that bring you happiness and alleviate pain. It's ok to hurt, it's alright to cry, but don't punish yourself over the loss. Be good to yourself and have faith that things do occur for a reason. Sometimes the course of our lives is guided by much larger forces in the universe that have a more loving and rewarding plan in store.

Best of luck, my friend,
PscyhGrad