I don’t think my boyfriend loves me anymore.

My boyfriend is in school for Nuclear Engineering in the U.S. Navy. I haven’t seen him since after high school graduation so roughly around 4 1/2 months. We’ve been together for 3 years and I love him with all my heart, but lately it’s been extremely hard. And we’ve came across this path before. We’ve always fixed it. Yet this path is different . It feels like we’re going two different directions. I feel like he’s given up on trying to love me. Given up on the future we always dreamed of before. Making sure we were in the each other’s picture. Now it feels like he doesn’t care. I literally cry every night on the thought of us not going through. And now I feel like I have no other choice. I’m not happy. I’m constantly sad. Crying every night is not good for me. I’m going to see him this weekend. I feel like I’m a bother to him . Like he has to tolerate me. He made a joke today after I said “ I hope we have so much fun this weekend !! “ and he said “ yeah. If not I’m going to break up with you “ like that wasn’t funny . It just hurt because it felt a true. I have no clue what to do. I don’t want to think of this trip as a negative thing neither. I don’t want to be speculating everything that happens to make a decision neither. My heart aches. He’s a completely different person now and I don’t want to let him go. Yet I know I may have to , because he’s not the man I fell in love with. It feels like he’s just an image of what he used to be now. I lost my bestfriend. And it completely is devastating me. Someone please give me advice. Should I stay with him and give him chances or if this trip doesn’t work out should I end our 3 year relationship? I’m crying right now typing all of this.