First of all, I think if you want your love to be meaningful, then I think you should fulfill it. You should respect her choice, because I think the school she chose or some brands she chose and so on, and some honest decisions are mainly acceptable to you and won't hurt him, so you should respect her choice. But you said that if he doesn't like you and likes others, you should respect him, because love is really helpless.
Now I think if you want to make love meaningful, you should choose to pay, because a military training can show your feelings for him. For example, he can take care of you when he is sick. For example, if she is in trouble, you can choose to help this silent thing. Maybe he doesn't know, but it has helped him a lot. Going out is also meaningful, which can make her happy. Because I think I can have it in the most difficult time. It's definitely a pleasure to have your friends help you.
Finally, I think. Then living should be for his happiness. I like children, but if you can't be together, then I think you should help him. The statement said that we should help him to live a happy life, let her emotions make his work and everything smooth, and then let him live a happier life every day. In that case, I think your contribution is very meaningful to him or to you.