I agree with Aud,,
You are only human and it makes sense you would have these feelings. You just wanted him to include you. You are a wonderful person just b/c once in awhile you have "feelings" it doesnt make who you are or your advice UNworthy.
My H has been in Mexico for over a month and I go thru these feelings too. And you know no offense to those bikini beauties but they just do not measure up to a REAL WOMAN~! Turn your vivid imagination down a smidge and take a deep breath. My imagination is really spectacular too,, my H told me he was going to a concert and I got a little jealous ( young girls would be there)
but I swallowed my pride took a deep breath and said well have a great time ( and I really meant it).
GUESS WHAT???? He called me over 4 times from the concert!!!!

To let me hear the music starting at 12 am and and a few times in between and the last one then at 4:30 am when he got home he called and said I am home honey and I love you bye.... ( and he is real stingy on the ILY's )
Just my 2 cents... hope they help you some.

Well sweetie just take a deep breath and you will be fine,, maybe next time he goes he will take you... you are a wonderful,beautiful person please remember that!

Have a great day...
God bless....