Hi, you're p.s. could be my p.s.!
Here is an unusual look for an infinity sign, ask your artist, if this effect could be worked up, possibly in the midst of a plethora of flowers:
http://i164.photobucket.com/albums/u1/kelleyargueta/newInfinity.jpg
Or incorporated in green and autumn leaves and the skeleton leaf:
http://www.christinederrick.com/leaftrio400.jpg
http://www.t-tutorials.com/data/Image/tutorials/autumn_leaves/leaves07.jpg
or in the center of a flower like this:
http://www.traceyjthomas.com/Images/paintings/red_orange_flower_lg.jpg
Here is a spiral made out of flowers, a sign of infinity:
http://farm1.static.flickr.com/219/493630792_de460d6bb2.jpg?v=0
Here is an infinity Celtic knot:
http://www.tglass.net/TGlass/Celtic/infinity%20celtic%20heart%20knot.jpg
Here is a double infinity symbol, looks kinda like a flower:
http://www.peyoteway.org/peyoteway/images/PeyoteG1.gif
I found this infinity with an S, (please do not use it, but be inspired by it):
http://www.neoweo.com/blog/wp-content/uploads/2007/10/foreverme80s_blog.jpg
dragonflies are an ancient symbol of longevity, hope, and magic:
This is a Celtic knot dragonfly:
http://www.princeofdiamonds.com/dragonfly.JPG
2 dragonflies:
http://www.ammedesigns.com/images/product/forever_silver_sm.jpg
So, work on a combination of the things that appeal to you, ... then see if you'd just want one thing, then sleep on it, and see what you dream!
good luck!