How can I make this more bearable?

Sorry Mate but the reality is theres nothing that you can do about it . web cam and phone calls aside, either you move to her or she to you. and as you only see her once a month she will undoubtedly hook up with someone new, as that seams to be the case with most long distance relationships. taking into consideration that you are both young people, you will most certainly be tempted by other people as your hormones have designed us to do that so prepare yourself for disappointment and good luck.