LONG DISTANCE RELATIONSHIPS

My boyfriend and I have been together for almost 6 months now and we've been doing the whole long distance thing for about 4 of those 6 month... I realize others have been in their LDR longer than we have but, at the end of the day, it is hard no matter who you are. I guess I'm just looking for someone else in a long distance relationship could give me any advice or inspiration they have to keep going, the more the better. My boyfriend and I are pretty positive about it but like I said, it gets hard. For others that can relate, What feelings do you have while you're away from eachother? good and bad? What about when you first see eachother again? Does it click instantly or does it take a while for you? Sometimes it varies for me so I don't know.   I just want to know that what I'm feeling is normal