I would encourage you to go to meetup.com.  I told my psychotherapist I didn’t have any friends and she suggested meetup.com.  I joined meetup and I have made 2 friends and several acquaintances in the past several years.  Also, there is a good article in additudes adult ADHD section about relationships that helps us adhders manage our friendships more effectively. I hope this helps

What do you find to be the hardest part of making friends? Keeping in touch? Having something in common? I have to admit that making and keeping friends has never been a big issue with me. I more so have problems with maintaining friendships during times when I’m feeling depressed. All the people that are in my closest circle know me at my best and worst, which is why they’re in my inner circle. They know not to have higher expectations of me and understand my tardiness and absentmindness. I think meetup is a great suggestion. I’ve tried it and it was a great way to meet people. Even though I haven’t been part of the couple of meetup groups I was in, for some months and years, I’ve still kept up with a few of the members I met.

I am in the same boat!
I don’t know how much time you have, but I would suggest getting connected somewhere. A church, yoga class, singles group, etc. Something that has helped me is looking for other people who need friends. I tend to be VERY self conscious around people and make awful first impressions because I am so worried about what people are thinking of me and hoping someone will like me enough to get to know me better. I don’t know if you have that specific problem, but something that has really helped me is to find other people who need a good friend too. Maybe you could even volunteer somewhere, like a local women’s shelter?
Friends are so important, especially for us women, and I know it is so hard when you are feeling lonely.

I agree I have always had a hard time making friends.  I have a few friends/co-workers.  However, I am in my 50’s and they are in there 30’s.  I have a few of friends that meet ever so often to scrapbook with, but outside of that I don’t have someone that I call on the phone or go out to eat with.  I had a close friend several years ago but, she got married.  I am divorce and my adult child lives in another state.  So, I am pretty much alone.  Also, I grew up in the military and my family moved every few years. So, I have always had a hard time make friends.  So, don’t feel alone.