Hi froggie4278
welcome to the Apple (user-to-user) Community!
Re: Messages won’t deliver : I’ve been trying to text a friend of mine for a few day
For Apple to Apple devices iMessages uses wi-fi over a strong signal / internet connection
For Apple to Android devices : To send texts, you may need cellular data turned on if your plan permits (charges for cellular data use may apply) : Apple support have an article online to help:
See: How to: Use cellular data on your iPhone or iPad - Apple Support
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Trouble-shooting:
You can check if your device is updated to the newest compatible iOS version:
Eg: About iOS 16 Updates - Apple Support says iOS 16.7.5 is the newest
This update provides important security fixes and is recommended for all users.
Try Settings > General > Software Updates : to see if an update is waiting to be installed.
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What to do: If you can't send or receive messages on your iPhone or iPad - Apple Support
All the best :-)