I regret growing up in a small family. I wish...
I wish I'd grown up in a large family / I hadn't grown up in a small family
I'm not very sociable. If only...
If only I were/was more sociable / I weren't/wasn't so unsociable/ antisocial
I've got a friend who speaks too quietly. It's very annoying. I wish...
I wish my friend would speak louder/more loudly / my friend wouldn't speak so quietly
I can't get to sleep before about 2a.m. If only …
If only I could get to sleep earlier/before 2a.m.
I often lose my temper with people. I wish...
I wish I didn't lose my temper with people (so often)
I can't cook very well. I wish...
I wish I could cook (well/better)
I'm frustrated because it's raining. I wish...
I wish it would stop raining
I regret not spending more time with my grandfather. If only...
If only I'd spent more time with my grandfather
