If you're being cut off from friends or family by the person you're seeing, recognize that this is a tell-tale sign. Be aware that abusers often claim that the people who were closest to you are actually meddling in your life [source: In His Steps].
You may be isolated in other ways, too. Take finances. If you no longer have control over your own banking account or credit cards, you're being isolated. If you can't go where you want to go without permission, you're being isolated. All of these forms of isolation force you to have a greater dependence on your partner, which is exactly what he wants. Isolation is dangerous and needs to be taken seriously [source: Help Guide].