We lived together for nine months we left each other ,we were together for five years we were high school sweethearts... but now he moved on I wonder if he still loves,think,n miss me??

Well I have this problem but it was for 3 years and I got over it after some time but because one day I thought " I have enough of this, I'm starting a new year and I want to leave it without regrets and finish everything so this problem can't hurt me, or I'll be as weak as I am three years ago" Because really if you couldn't get past something from that long, you never had become that strong.
My Opinion on this matter : Its been long and he doesn't want to see you because he WANTS to move on. So move on yourself, help him out and understand that only thinking about this will get you more evolved and into this problem. I know this won't be easy since you did love him too, but keep pestering him about this will make it hard for him when he's letting go. Be understandable, and just let him be, maybe he'll notice and think what kind of person you really are or someone who was more than he though.
I really have not much say in this matter since I don't know him or how he's like so I might be completely wrong about him. But you did spent about five years with him and your just now living your life without him is still hard adjust to, so take it slow and exercise, meditate on your breathing, clear your mind, about five to thirty minutes a day, so each day is add up how much you can forget and move on from him. I hope this helps, sorry for typing too much. I felt a lot of pain in mines.

Letting go seems not to be the issue. He is gone and admitting it to yourself is a hard thing to do. You need to deal with the reality of moving on and starting to heal. This is a painful process. But the pain will diminish with time.

Not having contact is a good way to start. You will be better off if you remove him totally. No calls, texts, or social web sites. Reminders you don't need.

Accepting that it is over and acting on that reality is the first step in the healing process. The sooner you do this the better off you will be.

NC will give you time to heal and and remember, you have us. If you need to vent we'll listen.

I just posted a something kind of similar. I was with my ex for 5 years. Met when we were 14, together until we were 19. I completely collapsed when we split. Everything had to change, my whole world was different. I literally didn't want to live anymore. We never lived together or anything like that, but I seen him almost every day even if only for a few minutes. My heart was officially broken. More than a year on and I still think of him. But believe me it gets easier. Every breath was torture this time last year, but now every day things are actually everyday things again. "The one" is bull, someone else is always going to come along eventually. Not for me yet, but you know, you have to kiss a lot of frogs before you meet you're prince and all that moosshy .

It'll get easier, even if it takes a long time.