Take a deep breath, calm down. I know it’s difficult. Trust me, you will get through this. Forgetting someone seems impossible but do give it time. You are still in love, in love with someone that doesn’t want you anymore. If you truly love, maybe he did it for the best for the two of you. Then again, just dumping you without proper closure makes him a total jerk. Either way, love should not be about pain, it’s about the mutual happiness you can give to each other, it’s about providing for each other while the whole world are against you. Being overly attached to someone who has abandoned you won’t get you anywhere. The first breakup is the worst, since you just don’t know what to do. Give it time. Time can heal even the deepest wound although it can’t heal everything.
Then help yourself. Get rid of anything that will remind you of him, chuck away all those photos, delete those messages. Keep them in storage if you must. The first step is to help yourself physically. Stay away from the places the two of you hold dear. Do not even try to keep in contact with him. You need to remove old memories in order to make new ones, such is the irony of life. Slowly find your old self again, as you discard the you that was with him.