Most if not all online photo sharing sites will not let you combine 2 pictures for this type of use.

The easiest way to have a single picture of the both of you is to open both pictures on your computer and take a screen shot. You can then upload this single image which looks like two separate images.

Photobucket is one of the most popular image sites, that enables member share images online. One of the most notable features of this sites is that you can save your personal videos on the site, make a slide show with a music background and you can look for any form of media from other members, either an image or an uploaded video. Furthermore, you can place your images from Photobucket to your MySpace account and eBay account. Another reason, a lot of users flock to this site, is the fact that you can avail of a wide range of services without any cost on your part.

As far as putting photos side by side using Photobucket, I found these codes courtesy of molten chocolate and LadyCerridwen48 of grownupgeek.com:

"look at the html codes of the two images. they look something like this:

< img src="http://1618.photobucket.com/albums/blahblah/subfolder/pic1.gif" >

But you see these little arrow things?:

< >

the reason there are spaces between the arrows and whatever they are next to is only because if we were to write it out perfectly here, on this forum, the html code would actually work -- and you'd see a picture instead of the instructions.

Directly after the code for the first picture ends:

...pic1.gif">

with NO spaces, right after the arrow, put this code:

&nbsp

then immediately, again with no spaces, start the next picture code."

OR

"OK, take the spaces out:

< url for picture > &nbsp < url for photograph >

When you want to go to the next row, use < br > (again, take spaces out)"