15 COMMON RELATIONSHIP PROBLEMS........

1. Affairs/infidelity/cheating (see: Surviving Infidelity and Signs Your Partner is Cheating). This includes emotional infidelity, one-night stands, internet relationships (including 'sexting'), long- and short-term affairs and financial infidelity
2. Sexual problems, particularly loss of libido (male and female) and uncertainty about your sexuality (are you bisexual?) or your partner's sexuality - could he or she be bisexual?
3. Significant differences in core values and beliefs (see: Relationship Compatibility Questions)
4. Life stages - you've 'outgrown' each other or have 'changed' significantly for whatever reason
   
5. Traumatic and/or life-changing events (see also: Brain Injury Symptoms)
6. Responses to prolonged periods of stress, such as work-related stress, long-term illness, mental health issues, financial problems, problems with the children, infertility... the list could go on!
7. Feeling bored in or with your relationship
8. Dealing - and coping - with a jealous partner.
9. Having 'blended' family issues (see: My Partner's Children Don't Want to Know Me and Adult children are rejecting my new partner)
10. Domestic violence, which includes verbal as well as physical abuse: THE most serious relationship problem (see: Signs of an Abusive Relationship and Signs of Emotional Abuse) See also: "My husband doesn't find me attractive anymore".
11. Knowing you shouldn't have got married in the first place! (See my relationship or marriage compatibility test: Stay or Walk Away)
12. Lack of responsibility from one partner regarding finances, children, health and many other issues (see: Children in the Middle)
13. Unrealistic expectations - still thinking your partner/spouse is the princess or the knight, and not seeing the 'real' human being
14. Addictions - substance abuse, gambling, sex/porn... anything that's become an unhealthy preoccupation (see: Alcoholism Stages and Living with an Alcoholic)
15. Excessive reliance on social media, to the detriment of the relationship (see: Facebook Problems)