All beginnings are lovely – or so the sage proclaims. Two individuals come together – attraction, lust, love, personality styles, personal and family histories, attachment and life styles collide – and there you are in the middle of a daring, challenging, and steamy relationship.

If this ship becomes a timeless elegant regatta or a wrack is heavily determined by the personality styles of the involved partners’.

Some people feel very anxious in both situations.”READ MORE: ‘High-functioning’ anxiety: it’s not a diagnosis, but many say it’s real Some can have panic attacks, while others can feel physical signs of anxiety, the site adds.

This can include stomach aches, shallow breathing, sweating or feeling tense.

Biological - People with depression may have too little or too much of certain brain chemicals, called "neurotransmitters." Changes in these brain chemicals may cause or contribute to depression.

Cognitive - People with negative thinking patterns and low self-esteem are more likely to develop clinical depression.

Genetic - A family history of depression increases the risk for developing the illness.

Some studies also suggest that a combination of genes and environmental factors work together to increase risk for depression.

Bipolar 1 disorder is when a person experiences defined manic episodes.

Bipolar 2 disorder is when a lesser mania, called hypomania, is paired with depressed episodes.

Co-occurrence - Depression is more likely to occur along with certain illnesses, such as heart disease, cancer, Parkinson's disease, diabetes, Alzheimer's disease, Multiple Sclerosis and hormonal disorders.