Unable to move on from break up. Doctor?

One week ago i have a break up with my partner and we were in long distance relationship since 2 year and from few months ower relationship is not going well and at last she said that i want to go with someone else and on this topic i fight little bit and i say please give me some time be with me for few days after that she stays for 4 days and after that she said I can't stay more and she blocked me from everywhere.. soo due to this break up i am unable to move on and i don't have any friends or any family members to share this all so i always think this and because of this i am suffering from pain  and daily in night i wake suddenly in night at 2 or 2:30 and i start remembering that she use to talk me at late night and now she is talking to someone else and this hurt me alot .. please help me doctor