Sometimes pleasing another person will make you feel bad

ENGLISH ONLY

When you really wanna be with someone but there's two roads ahead,

you'll have to choose witch to take. 

Either way, theres a good and bad in every decision.

 So, let me tell you little story about a new relationship with strong and kind military boy and a simple and emotional girl. These two have been in a relationship very little time but feelings are strong and they're happy. They text everyday to eachothers because theres a gap between them, military. They have seen eachothers every chance they get.
I dont know about the boy but the girl is sad and gasping all day long all alone in her apartment and thinkinh abut the boy. There's still scent in the bed sheets from hi's last visit and se cries a tear or two when she falls asleep at night and wakes up in the morning.
Las time they saw eachothers, it was only one evening, night and morning together but it was all perfect. The girl was smiling and thinking that the next weekend would be longer, when she watched her man step into a train. 
The next day the girl had a text from the boy about the next weekend. He would be picking her up that friday evening and ofcourse she was ok with it. Then he said that he was invited to a party that saturday.
She became asking that what will she do in that time. There was talking abut that she maybe could come too but things got kinda hard. There was calls and texting about that evening and it looked that way that she could not go with him. The girl got littlebit worried she might lose the longer weekend with the boy, but the party witch he would go will be full of his friends witch he hasn't seen in a long time.
The boy asked the girl what should we do about this.
Well ofcourse the girl would love to spend more time with her boyfriend than home alone, when he was partying and having fun at the same time.
But she didn't wanna be a bitch in his eyes so she told him to go and she was okay with it he taking her home before the party.
Things happend and weekend came like a wind. They had a great time together again, like always. Saturday came too fast and the girl realised that they would be apart again and this time much longer that before. It was only a week but this time it will be ten days.
She was feeling happy about that the boy was feeling happy that he could see his friends again but at the same time she was very sad and wistful, and the boy saw that in her. He didn't think through when he said that he could try to get her with him to the event, just one call and guestion but he was skeptical about it. He got her hopes up. But they came crashing down when he drove the girl home later that day. She didn't show anything to her boyfriend but as soon as he shut the door behind him the girl crashed and bursted to tears, broken by grief, disapoinmet.
She sat down to the cold floor and was trying to gather her tears, telling herself to cheer up and this was the best way to show her feelings to him. By letting him go and not being selfish from keeping him from his friends. Even if the evening will be spent all alone in her apartment. Yeat again, feeling sorry for herself, under a blanket, sitting on the couch doing nothing really.

So, i got littlebit sad about my desicion, witch is kinda little but means alot at the same time. Eitherway otherside of this desicion will get sad/happy or mad/happy. But at the same time i'm really happy what i decided because there's a bright side; his smile.
But in reality, when relationships are at this state, beginning, new.. Friends should be second thing you think about, right? Im like that and maybe that's why it feels like shit. Being on that second place when you sould be on the first. Friends will come and some will understand. Some will stay and some will leave but when it comes to the partner. It usually ends things up. Even if you just would like to please your partner.

What would you have done in this situation?