Anxiety sets in. Never knowing when or where he's going to turn up or what he's going to do next, they can think of little else. Victims start to short-circuit mentally and emotionally. Exhaustion follows, along with profound depression. Then self-esteem starts to disintegrate.
Victims start to blame themselves.
Eventually, they get angry, so angry that they're ready to do almost anything to get the stalker out of their life. Finally, they accept what life has become. Only then can the victim start to deal with the situation objectively. It's not fair, and most people don't like hearing this. But if you want to protect yourself and your loved ones, it is reality.