I have been in a relationship with my boyfriend when we both studying our Master degree two years ago.our relationship got more serious when we both finished our course.he started his phd 2 months ago and everything starts to get worse.we are not the same as we were before.he started to forget things about me .he is very serious in his studying and seems that the situation will get worse all the time.I do feel very alone now cause he moved to another city for his phd. this really bothers me and I am thinking about splitting up but I love him and its very difficult for me..I do not know if he feels I am not supportive enough but I am very sick of this relationship and I don't want to be his second thought all the time..I feel like I am not his priority any more and that's out of my control .what do you guys think? what should I do now?