Boyfriend is giving me the cold shoulder. I think I'm losing him?

Anonymous
I'm in a long distance relationship with my boyfriend. We have been dating for just about a year. (We knew eachother for a couple of years before we started dating. But we now live in different states) We see eachother every 2-3 months. Either I go visit him or he comes visits me or we meet up in our home town. We were together just this last month- spent the whole summer and did some traveling together. and now I'm going to see him in November. We have planned on moving in together once he finishes up with college. (He's in his last year) so we don't plan on being LDR'S for that much longer.

Anyways... lately he's been giving me the "Cold Shoulder" We used to talk in so much more depth then we are now. Even if we didn't text much through out the day- the texts were always sweet, and cute. Now they are one worded. bland texts. He used to go crazy and text me "BABY!! I LOVE YOU!!!" all the time, or "hey sweetie, i'm thinking of you at work". but now... it's "hey", or "morning" or "nighty night". I don't understand. I tell him every day that i love and miss him and all he can say is "yeah?" I ask him if he still loves me and he says" oh here we go, again" "You know the answer to that" Sometimes I feel like screaming REALLY DO I? BECAUSE IF I DID WHY THE F WOULD I BE ASKING IT!!! ugh, We used to talk every night on the phone before bed.. now i get no calls and if i do it's just him saying "hey, goodnight.. gotta go now bye." There is no more I love you's from him. But yet he still tells me he is excited for me to go see him in November.

I'm soo confused as to why he isn't treating me like his girlfriend that he loved so greatly. It's like he's bored or annoyed with me. In a matter of weeks he turned into a totally different person! Its really hurtful and every time I bring it up or try talking about it to him he gets angry and says stuff like "We always have this conversation, every night"

I just can't get through to him. I think I'm really losing him.
Updates
+1 y
What started his "attitude" -he talked about "really considering, breaking up" then, He ignored me for a week. When I told him I was just about done, i needed to either move on or be loved- he said sorry i just miss you. But still he's acting distant
Boyfriend is giving me the cold shoulder. I think I'm losing him?
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