I am not qualified to offer a diagnosis but it sounds like you may have gone through a trauma of some sorts and your mate is triggering that.

Some people at Psych Central choose a therapist to untie the knows in their life. If the feelings stay ready to explode, a psychiatrist could diagnose your situation and prescribe meds to stabilize the situation and lessen the emotional charges building up.

Many people find compassionate, caring people here at PC. Some people find the forums give them the compassion and empathy they seek. http://forums.psychcentral.com

There are articles that go into more detail about coping
Psych Central - Trusted mental health, depression, bipolar, ADHD & psychology information.

Please feel free to private message any of the Community Liaisons by left clicking on the name in blue to the left of their post) for questions or just to share.