Should i go on holiday on my own

Of course! I’ve had holidays on my own for years. It’s much nicer than going with someone else - you can only do the things you want to do, and you can be as lazy or selfish as you like without any criticism. It costs a bit more per person, but it’s still cheaper than the full cost of a holiday for two.

Why not.?One of my most enjoyable holidays were just myself with my dog having a long weekend in North Devon. Well the dog didn't complain

Cruises are great for singles, if you have the right attitude for it www.cruisewatch.com/cruise-guide/singles-cruises/singles-cruises-expectation-vs-reality

You might feel better doing a guided tour. Companies such as Jules Verne are very good and dont usually have such big groups.
Cruises ,river or sea are good too as long as you avoid the huge ships where you could feel lost.If you look carefully the smaller ships usually have excursions, tips and drinks with your meal included so although they might look expensive initially they work out the same . All the best choosing.

I really want to go to sorrento. I was wondering about a cruise but not sure if i would be surrounded by couples

Yes of course. Do make it a holiday for singles though then you would be with lots of people wanting to be sociable. It wouldn’t be as much fun if everyone else was paired up.

Do it! What can you lose? My mother used to say …well even if you hate something at least you have something new to moan about!

Yes, If you want suggestions what’s your budget and what do you like doing?