What am I missing out on in life if I don't have a girlfriend?
Depends entirely on the girlfriend. Some things you might be missing out on:
Soft smells from her hair, her skin, her extra set of clothes that she leaves in your closet
Hugs, peekaboo-guess-who, kisses on the back of your neck when you're hard at work and forgot about the world around you for too long
Good cooking, or maybe good-morning coffee, or good takeout
Inspiration, shared jokes, mind-bending middle-of-the-night discussions
An enthusiastic fan of your career, your writing, your sense of humor, your (terrible) saxophone playing, your pickup games of basketball on Saturday mornings
Stories of her life before you
Someone to brag to, who loves listening to you brag
Whispered sweet nothings
A helper when you need a hand
Tons of new experiences, new places to go, new foods to try, new friends to learn about, new authors and artists to consider, new lingerie to appreciate
Someone to grow into and grow comfortable with
Someone to tell secrets to... good ones and bad ones... without judgement
Phone calls when your boss isn't within earshot
Texts when your boss isn't looking
A hand to hold, and arms to hold you, when times are tough and you're not sure you can support your own weight any more
A perspective very different from your own, but meltingly familiar
Someone to be insanely, animalistically, proud of at all times
Someone to be insanely, animalistically, protective of at all times
Someone to be insane and animalistic with. At any time.
Nothing, mate! The grass is always greener on the other side. Single Men don't want to be single and attached men wish they were single again. Go out and enjoy life! Stop worrying about things that are not part of your life at the moment.