I'm going to drop an unpopular opinion: I love going to Disney parks alone.
Having the ability to eat where I want, when I want, choosing rides, how long I want to rest, and where I want to shop it totally up to me and I LOVE IT. I like to take my time and I tend to be a creature of habit meaning I hang out in New Orleans and shuffle back and forth between Pirates and The Haunted Mansion. I eat lunch at one of the restaurants in New Orleans Square and great a corn dog at the Stage Coach Cafe stand outside frontier land (cheapest place to get them!) just before the fireworks.
I'll be completely honest and admit that this new appreciation for all things Disney is something I'm rediscovering in my 30th year. I haven't been to the parks since I was 17 and even then I wasn't a massive fan. I had only been able to go a handful of times just because of how dang expensive it was for a whole family. Granted, being a Southern Californian we get a few more discounts and perks, which brings me to my next thing: Annual Passports.
I ended up wanting to go on a regular basis (my work is very stressful and being in San Diego, it's a nice twice a month trip), so I bit the bullet and got the top tier passport so I could get the free parking and Max Pass. But I'll talk more on all the perks of this later, you want to know how to spend a day alone at Disney!
Learn to take your time: There's no need to rush to every ride and food item. Most of the bigger rides have Single Rider passes on the not - so busy days that totally make your day go by without a hitch. All you have to do is let the cast member at the front know that you're a single rider and they'll let you know where to go.
Maxpass is your new friend: This is an additional cost to your ticket, a whopping $10, but it really makes a difference in your day. Immediately after you've scanned your fastpass on your phone you can schedule your next fast pass while waiting to get on the ride. I was able to do all the major attractions in under two hours the first time I tried this.
Eating alone isn't weird: I've eaten at the quick services and at the table service restaurants alone and most of the time the cast members want to know if I'm celebrating anything special and that I'm enjoying myself. Otherwise, they usually set you up in a good location since you're dining alone. I can Instagram my foot to my hearts content.
Loneliness happens: This can happen a few times throughout the day, but in the end I hear some parent getting into an argument about how much fun the kid is suppose to be having, Larry, or a bunch of teens are being teens...goodness I sound so cranky, but the main thing is, this is for you. You did this for you. You spent the money to enjoy this magical place so you could escape that reality and try to touch back to those days when you believed a little fairy dust helped fix all your problems. We all know it won't anymore, doesn't mean you can't get weepy when the fireworks play with your emotions a little.
My tip to you would be make as many memories for yourself as possible. Heck, you might make some friends along the way! I meet so many people in lines, and there is some magic spell that reminds people of manners once they enter the parks. Don't be afraid to say hello to someone, or compliment them on their Disney Bounding. HAVE FUN!