On the old old Facebook it was possible to use HTML, like this:
<strike>strike it good</strike>
The new Facebook doesn't allow this. Probably for security and privacy reasons.
What the new Facebook does that the old one doesn't is "UTF-8". Which means even though you're using English, you can also use foreign letters in an artistic fashion.
Thus these will work perfectly if cut and pasted into FB:
* ¡uʍop ǝpısdn ɯ,ı 'ʎǝɥ * I̶'̶m̶ ̶t̶o̶t̶a̶l̶l̶y̶ ̶n̶o̶t̶ ̶w̶r̶i̶t̶i̶n̶g̶ ̶t̶h̶i̶s̶
For strike-through, you need to use a specific "combining diacritical mark" called a "combining long stroke overlay". Instead of showing a letter, it goes back to the last letter and does something special to it.
You can dig for this letter in a Character Map program(Windows users will find this in their Start -> Programs -> Accessories [-> System Tools] folder). Depending on your system, they'll be called "modifier" letters, or "combining" letters. Either way, those go right on top, so pick one out and paste it in.
It is really tedious, but it works.
There is also a website that generates the modifier letters for you:
http://adamvarga.com/strike/
And another, which even allows multiple types of strikethroughs: http://manytools.org/facebook-twitter/strikethrough-text/
Also a tool which does upside down text: http://manytools.org/facebook-twitter/type-upside-down/
In most of Facebook's native applications you can't. If you're after a platform for personal expression you should probably look elsewhere.
The Notes application does allow some formatting, though, using HTML-like codes. To underline in Notes: <u>underlined text</u> For other formatting options in Notes see related links below. In Chat you can underline text with the underscore character: _underlined text_
This is text that has a line drawn through it. Like so: Strikethrough
a line through a section of text
<strike> text </strike>
Strikethrough
The S in the toolbar for answering questions on WikiAnswers is to apply or remove the strikethrough, which appears on text as this. It is used where a part of text was part of an earlier version, but has been edited out of a later version. The strikethrough indicates it has been left in for the reader to decide whether it is included in any version they wish to use; because of the ability to remove and replace text if necessary here, it is somewhat superfluous.
Changing the font. This includes type, size, bold, underline, strikethrough, superscript, etc.
You copy and paste it into the box and you can change the text to.
Yes, go on the facebook homepage on your laptop or phone and press get facebook mobile. Then it will send you a text. Click download and it will appear in your apps.
To highlight text in a Facebook post, you can use the following steps: Start typing your post on Facebook. Select the text you want to highlight by clicking and dragging your cursor over it. Click on the "B" icon that appears above the selected text to make it bold, or the "I" icon to make it italic. These options will help your text stand out in the post.
You put underscores around your text, like this: "_italics_" and it will change. Other handy ones are dashes for strikethrough and asterisks for bold.
FWM in text language means " with me." The first word is one that is not appropriate to use on WikiAnswers.
That is a personal choice that your boyfriend is making. Surely if he can text Facebook, he can text you too but he is choosing not too. Talk to him and ask him why.