Am I in the wrong ?

So on Monday will be 15 months with my boyfriend. We go to different schools and we only see eachother on weekends. He went out of town with his family this weekend and doesn't have service... I'm finding it really hard to be ok and not be upset that he is gone and that I can't talk to him. Everyone is tell me I just need to get over it and that I'm fine and to clingy etc. am I ? I just miss him and never see him so it's hard.