Hi OP
I’m sorry you’re feeling like this.
Do you think you haven’t quite come to terms with your previous losses? I think I would have found both of those things traumatic to the extent of not being fully recovered in what is a relatively short time.
Some people aren’t able to deal with others’ sadness; it may be that your friends feel that your recovery should have been done and dusted by now, but as you know, these feelings don’t run to a timetable. Or, not knowing how to react, they have distanced themselves somewhat.
If the people who were your friends are not being supportive, maybe it’s time to find new ones? Maybe join a gym or yoga class or walking group or choir to meet some different people outside your normal circle, depending on what you fancy and is available in your area.
You may already have had therapy, but I think it would help if you haven’t; such shattering events can be tough to move on from without help.
You could also think about a holiday with one of the solo-type travel firms. A friend went on a walking holiday in Italy and made a couple of good friends who are longer distance but nevertheless are still friends 15 years later.
Depending on where you live (big city/small town) just being in the same place at the same time (park/coffee shop/pub) can be enough to get recognised by others who are patrons, that can lead to conversation and conversation can lead to opportunities to enlarge your social circle. It’s amazing how an “Evening” or “Morning” can get things going.
I realise these are all things you may have tried/thought of.
I hope you find some more sympathetic and inclusive friends to connect with.