Long Distance Relationship.

My boyfriend and I have been together for a year and a half now, but in two weeks, he's moving to another state for 6 months. He won't be within driving distance, and I can't afford plane trips to see him. I know that 6 months isn't a super long time, compared to some ladies who go longer than that without seeing their significant others, but for me this is going to be really hard. I'm currently fighting anxiety and depression, and he's the only one who knows how to help me through my worst anxiety attacks, and my darkest days. I know he's the one for me, and we plan to get married in a few years.  Just wondering, how do some of you ladies make it through your long distance relationships? Any advice is appreciated!