Dreams involving loss, particularly of someone you care deeply about, often reflect deep-seated fears and anxieties rather than actual predictions. Your dream about your boyfriend dying in war may symbolize your feelings of vulnerability and fear related to his military career and your long-distance relationship. Here are some aspects to consider:

1. Fear of Loss: The imagery of war and the message about death could represent your subconscious fears about the dangers he faces in his job. It’s natural to worry about the safety of loved ones, especially in high-risk occupations.
2. Long-Distance Relationship: Being apart from your boyfriend might amplify feelings of anxiety and helplessness, which can manifest in dreams. The dream could be expressing your concerns about the emotional distance and the potential of losing him, even if not literally.
3. Emotional Processing: The gut-wrenching feelings and tears upon waking suggest that your mind is processing significant emotions. It could be a release of pent-up anxiety or sadness about your relationship or the circumstances surrounding his military service.
4. Support System: The presence of your grandmother in your dream indicates a need for comfort and support. This could mean that you are seeking reassurance during this challenging time in your relationship.
5. Transition and Change: The shift to staying alone in a hotel may symbolize a transition in your emotional state. It could reflect feelings of isolation or the need for solitude to process your feelings.

In essence, your dream highlights your fears and emotions surrounding your boyfriend's safety and the challenges of your long-distance relationship. It may be beneficial to communicate openly with him about your feelings and concerns, as this can help alleviate some of the anxiety you’re experiencing.

Dreams about loss, especially concerning loved ones, can be particularly intense and emotional, reflecting your fears and anxieties in waking life. In your case, dreaming about your boyfriend dying in war may symbolize several underlying feelings and concerns.

1. Fear of Loss: Given that your boyfriend is in the military and you are in a long-distance relationship, it’s natural to have fears about his safety and the possibility of losing him. This dream could be a manifestation of those fears, expressing your anxiety about being apart and the uncertainty that comes with his line of work.
2. Processing Emotions: The gut-wrenching feelings you experienced in the dream could be your mind's way of processing your own emotions regarding your relationship and the stress of long-distance dynamics. The devastation you felt reflects your deep attachment to him and the fear of what could happen.
3. Communication and Connection: The text message in your dream may signify a desire for more communication or reassurance from your boyfriend. In long-distance relationships, it can sometimes feel challenging to maintain a strong emotional connection, and this dream could highlight that need for closeness.
4. Transition and Change: The shift in the dream to you being alone in a hotel might suggest feelings of isolation or uncertainty about the future. Hotels often signify temporary states or transitions, so this could reflect your current feelings about your relationship and the changes that come with distance.
5. Emotional Release: Crying upon waking could indicate that your subconscious was processing deep-seated fears and emotions that you might not fully acknowledge during your waking hours. It's a normal response to such intense dreams.

In light of this dream, it might be helpful to communicate openly with your boyfriend about your feelings and fears. Reassuring conversations can help strengthen your bond despite the distance. Additionally, consider finding healthy outlets for your emotions, such as journaling or talking to someone you trust about your feelings.