M2C, I had DH do mine nearly all the time. One time he rang to say he was going to be late and I would have to do it myself and it took my a good half an hour to work up the courage. It's just getting it in that first time that's hard. These days I have to inject myself with insulin 3x per day and don't even think about it anymore!
It's good to be able to do it yourself in case your DH can't be there, but otherwise just let him do it if he can so you dont have to get yourself worked up!