I would suggest talking to a therapist about
all of this. I also think relaxation and mediation could be good for you. When you begin to stress out try and block those thoughts out. Take deep breaths and begin to relax your body. When you are feeling calm enough begin to deal with the thought you were having before in a calm and rational way. When you think about
it rationally some of the scary thoughts may not seem so scary.
Your thoughts are causing you to feel very anxious about your relationship, but remember - Feelings Follow Thought - so you need to identify and then re-evaluate, and change your thoughts then you will feel differently. Cognitive behavioural Therapy works in this way. I am going to post a link to a free CBT program you can work on from your computer. Many of our members have found this site to be helpful.
Free on-line CBT programs
http://www.moodgym.anu.edu.au/welcome
I hope this helps you in some small way and do keep talking with us as we know where you are coming from and what you are going through.
Kindly,
Kitt