Trust me, when I was single and I had to listen to my roommate who happens to be my best friend since 3rd grade snogging...and other things with her boyfriend while I was still in the room, I wanted to duct tape the to opposite ends of the room. Then, any time we'd try to watch a movie, they would have to have the couch and kick me onto the floor so they could snuggle and use obnoxious baby talk and tickle and giggle the ENTIRE movie. Gag me...
But now I'm the married one, MUHAHAHAHAHAHAHAHA. *Straightens her hair and clear her throat* I mean...now I know what it feels like to be completely in love with someone, and all you want is to pretty much absorb them into every facet of your life. But having seen what it felt like, I know that there is a time and a season for everything. There is nothing wrong with showing my husband affection or enjoying being around him, but there is no reason for me to be glued to his side with our tongues down each other's throats every public opportunity we get. It's hard to in the balance between being in love and being respectful to those around you.
Interestingly enough, today, while I was at work, I had a middle aged (not so attractive) couple come in to get some icecream. The entire time I was preparing it, they were being QUITE intimate with one another (to the point that his hands were exploring anatomy that was completely innappropriate). I just kept my eyes averted and made a joke that if they got any hotter, they were going to melt my icecream. Had there been children around, or other customers, I would have directly asked them to stop, but since I could focus on other things, I let them...do their thing. Still, I felt it was extremely direspectful to be showing THAT level of intimacy in a public place, especially in front of someone who is trying to do you a service. I couldn't ask them questions about their order because they had their tongues wrapped around each other's tonsils in some prehistoric game of tug of war uvula style...but it makes me smile when I see couples holding hands, smiling at each other, and giving little kisses. I personally think it's the cutest thing ever to see a guy kiss the top of a girls head and close his eyes like you KNOW he's thanking God for her.
Things like that should make you happy, to know they are experiencing love, since God is love. It should give you hope that you'll be that couple some day. Don't let Satan twist it into rage and jealousy, don't let it eat away at your heart and make you bitter and angry. Let it build you up, let it bring you closer to God.