I know exactly how you feel. I've very insecure and often question my relationship and my husbands feelings. Lately, he has been under a lot of pressure because of his family which has made him moody and anti-social. He keeps telling me it doesn't have anything to do with me, but I worry so much that it does and I find it hard not to blame myself.

Feeling insecure like this puts pressure on the other person though, which isn't fair. I know it's incredibly difficult, but try your hardest to just trust her. Maybe sit down and have a talk with her, letting her know that, despite your insecurities, you're there to help her in any way you can (even if it means giving her space). I think it's also fair to ask her to be patient with you as well. Things are hard for her, but things are also hard for you too. You both need to look out for each other.