I lost a lot of friends when i moved, but before that i lost a lot of friends when i stopped drinking in the past. Same reasons they always expected me to be there for them, and i was. Then i stopped, since their being there for me was going to the bar. I no longer wanted that type of friendship, so i walked away.
I used to be like you and feel too much, like i had to be there for them, yes i wanted to, but also i thought like you its a two way street, except it wasnt.
It took me a long time to be ok with not always giving, but if someone is my framily, who at this point i only have one person like that and we are equally there for eachother. the others, i had to stop, as it drained me too much.
sending hugs!