First Install Virtual Box if you have not already.
Go to this site-->
http://androvm.org/blog/download/Download " androVM_vbox86p_4.1.1_r6.1-20130222-gapps-houdini-flash.ova"
When you go to download, an option will pop up for it to be installed under VirtualBox, choose that and VBOX will open and install Android for you.
Before Running go into the vbox settings for the Android, and make sure your internet is bridged.
After Running, you will be greeted with the Android screen, if it locks, just move the lock to the right with your mouse.
You will need to set up a gmail account to use the Play Store if you do not have one.
There will be a Circular button that leads to all the Android Apps, click this and find the Play Store.
In the Play Store, Use the Search feature and Find "Text Plus".
Install Text Plus...You will have to set up an account, but this is quite unproblematic(Does not need a phone). After all is said and done, to make a text, go to compose message, and click add...here you add the number you wish to text.
Text