Autism and Hermit life [I Battle Depression]

I've been indoors since 16 and was diagnosed with autism at 11 I've always been different I hate outdoors definitely can't stand crowds and dread public transport I've had a tough life I don't have any family but I do have a boyfriend whose somewhat supportive it's long distance.
The only time I go out realisticly is when I see my 1 friend or my boyfriend if we go out or to empty the bins life stays like this.
I don't find it necessary to make friends and find it incredibly draining and a waste if time talking to others I never finished school i dropped out of college I physically can't be around too many people or else I will feel drained and it takes months to restore my energy but in general I like my own company.
I hope I can actually make it to go shopping tomorrow I still haven't been to my local library yet I've been saying this for the past week lol if there's anyone similar out there why is it like this?