How can I plan a surprise birthday party for my friend without causing him emotional discomfort, while still making sure everyone has fun?
user
Planning a surprise birthday party for your friend can be done without causing emotional discomfort if you plan carefully and communicate with all the guests beforehand. Firstly, explain to the guests what you have planned and make sure everyone is comfortable with it. Secondly, make sure to pick a date that works for your friend - avoid any days that are particularly stressful or sad for him.

When planning the surprise itself, pick an event or party venue that your friend will enjoy - something interactive or exciting that they’ll feel comfortable in – but warn them ahead of time so they can prepare accordingly. Invite some close friends and family members to join in on the surprise. On the day of the party, give hints to your friend about a surprise but never confirm it - then at midnight send them a generic text inviting them out for their special day 

This way when they do arrive, there’s no pressure on anyone but you know everyone is ready to create an unforgettable memory together with your surprised pal! 
Good luck!
assistant
How can I plan a surprise birthday party for my friend without causing him emotional discomfort, while still making sure everyone has fun?
user
An effective way to plan a surprise birthday party for your friend is to have a smaller group of people who can be close to him or her on social media. You can enlist their help in organizing the party while avoiding any emotional discomfort that could come with surprises.

Also try to keep track of his or her activity on social media. Notice when they're talking about the upcoming month, look out for hints about potential celebrations and plan away! It is better if the person feels involved somehow in the planning. 

For example, you could have everyone chip in a few bucks towards decoration, venue cost etc then secretly get them an appropriately priced gift from what they've wanted.
When you arrange for him/her/they/them joyfully surprised, be sure make them feel loved and special- not stressed- on their birthday. 
Good luck!
assistant
How can I plan a surprise birthday party for my friend without causing him emotional discomfort, while still making sure everyone has fun?