I have been married for 18 months and I have a 12 year old son from my first marriage.
My DS and my husband have an uneasy relationship and I often feel that my husband tries to find things to moan about regarding my DS. The problem is that it's all very subtle and I would have a hard time coming up with examples of this. There is a lot of huffing and puffing and rolling of eyes at things DS says/does and my H "tells tales" on my DS for not bringing his drinking glass down from his bedroom/keeping his room in a bit of a mess etc etc. His room is not particularly messy in my opinion and I'm not really fussed if there is one glass in his bedroom.
Secondly my H has started being a bit funny if I do things without him. I feel like I have to tell him about seeing friends weeks in advance and I can't do anything spontaneously anymore. Last week my friend contacted me on a Sunday morning to say she had thrown her husband out (long story to do with him drinking all of the time) and I said to my H that I would go and see her on Monday evening for a chat.
On the Sunday afternoon he was a bit off with me about this and said that I just told him what I was doing, rather than asking if it was ok. I was a bit 
about having to ask if I can go to see a friend.
Today I forgot that I had a dental appointment and that I would therefore be late home from work. Because the reminder was sent to my email in Janauary I did a screen shot of it (for my records, so I could find it easily) and then text him a copy of it, and just said I would be a bit late home because of this.
I got this reply " why have you sent me the email? Do you think I don't believe you? Very strange"
I realise that these things are quite small and hard to explain properly here but it's making me feel very uneasy. My first marriage was very violent so I am hyper sensitive to any kind of control. However I am starting to feel trapped and suffocated and I want to leave.
Before I do anything I wondered if anyone here thinks that I am being unreasonable in leaving him over these things.