Well, I'm still in year 2 after losing my mum, but what I have learned this time round is that it is easy to think you are doing ok and things are getting better, but you are not always right. It only takes one little event to make you feel irritated with life and impatient with people in a way that you would not have been before your loss and to be easily upset by things and made to feel very insecure and unstable again.
I think some of that stems from not having the person you have lost to talk to about whatever it is that is going on that has upset you and that just emphasizes the fact that they are not here further and that just upsets you more and makes you even more unhappy, so it's a hard thing to cope with. I just go from day to day and do my best to cope.
As Emz says, you do find yourself reassessing your priorities and I found it useful to work out a plan to guide me forward and hopefully cope better with the future on a practical level, but, like Emz, I find my work to be something I don't feel the same about in light of that and am currently reassessing that part of my life. I feel a lot of frustration about the on-going red tape I am having to deal with which also doesn't help, but not everyone gets caught up in that, so hopefully, that isn't a problem for you.
It sounds like you have done well with sorting out the practical things, moving, seeing friends etc., but you are right, people do see loss, even after such a short time as 'old news' and expect you to be 'over it' by now. I find that too. The truth though, as you say, is that you are not and if you have never experienced loss personally, I don't think you can understand that, so that's probably what's going on there. Also, people just don't know what to say, so we protect them from having to try by painting on a smile and pretending we are ok when we are not, so that the other person doesn't have to be embarrassed by floundering for the right way to react to that. But that leaves us struggling with it on our own, which doesn't help us. Thank goodness we can at least talk to others who understand here.
In terms of coping with the person you have lost being gone, that continues to be an up and down thing. Some days are okish, others are still liable to get me down a lot. I still miss my mum terribly and for some reason, have found myself dwelling a little on the harder memories of the last few years of her life lately. I wasn't doing that so much up to now apart from in the early months after losing her. Perhaps that has to do with your mood and whatever else is going on in your life too. Whatever the cause, all you can do is return to your strategies that help and keep using them to try to feel better and keep going, one day at a time.
Grief is uncharted territory for us all and we just have to navigate it as best we can. Try to stay strong and keep going. We know by now that even if we have a really bad period, we will also have better days again too. It's an unpredictable journey and I think things just do knock you back unexpectedly from time to time and that's just part of it. Keep going. Sending you an understanding hug.