MLC step by step...what's next?

[Lilith]

Sorry I haven't been here or log in here for awhile. I had a tough week but at the same time GALing myself.

H went on vacation with OW. He asked S to bring him to the airport so I was wondering if S knows already about OW. I didn't ask S about it and he didn't say anything to me either.
It's been really a tough week; I had a hard time focusing on myself...our vacation last year and "their vacation" now keeps playing in my mind like a movie all the time.
Although my sisters came to my rescue (they visit and spent time with me for few days)but still I can't help myself but think about H & OW together
Days before his departure I avoided seeing him so I didn't have to mention about his/their vacation or say goodbye or wish him whatever....
Now I am anxious as to what to say or how I should react when I see him when he is back on Tuesday at work. Isn't it kind of weird to ask how his vacation was; whether he enjoyed it?
But isn't it feels awkward too if I just ignore or not say anything about it?
Any thoughts/advices is appreciated. Thanks!