People go to therapy for help with all sorts of different problems & difficulties.  These may include:

Mood Disorders such as:
    Depression
    Bipolar Affective Disorder

Anxiety Disorders such as:
    Generalised anxiety & worry
    Panic
    Phobias including Social Phobia
    Obsessive Compulsive Disorder

Stress, Adjustment & Trauma Disorders such as:
    Post Traumatic Stress Disorder
    Situational Crises

Eating Disorders such as:
    Bulimia Nervosa
    Anorexia Nervosa

Family & relationship problems arising from:
    Separation & divorce
    Step & blended families
    Parenting issues
    Negative communication patterns
    Poor conflict resolution skills
    Unrealistic/incompatible expectations
    Infidelity
    Sexual dysfunction
    Problems with intimacy

Dealing with major life transitions such as:
    Death
    Pregnancy (Post Natal Depression)
    Illness, accident or injuries     
    Separation & divorce
    Redundancy, redeployment or retirement
    Getting older

Low self-esteem
    Poor self-concept
    Feelings of worthlessness
    Poor confidence
    Self-doubt

Problems in adolescence: 
    Bullying & teasing
    Exam stress
    Test anxiety
    Low self-esteem
    School refusal
    Deliberate self-harm
    Poor anger management
    Parental conflict

Grief & Loss

Drug & Alcohol misuse

Seeking help is not a sign of weakness.  It is an indication you are acknowledging you have a problem & have the desire to do something about it.