I tried making friends online, as well.
I tried EONS, a site for those 50 years and older about 5 years ago. EONs shut down in May, 2012 and has not come back since. Making friends here was not the easiest. I did join some groups and did post at times but didn't have many friends there at all.
I also tried SparkPeople four years ago. This site is still up and am still with with them. I have a handful of friends that respond to some things some of the time. I have one person I share private messasges back and forth with but they're rather infrequent. She and one other person in particular do provide regular feedback on the friendship feed letting me know they read my updates and provide standard encouragement statements of "Way to go!". But that's about it.
I have a Facebook account. That's a joke, considering most of my friends are family and nobody even responds to anything I say or contacts me even if I contact them, so I quit. The best I have there is a niece that pokes me regularly. But there's no meaningful communication.
I thought of the online idea years ago when I couldn't find real life friends, hoping it would find friends who would share my interests, someone to share ideas or experiences or ask questions for feedback on things or to seek and provide encouragement and support. I did find some of that but not nearly enough. It was better than nothing but it just doesn't take the place of actually seeing someone, being with someone, hearing that person talking to you face to face or having that person calling me on the phone knowing this person thought to call me and wanted to talk to me. I miss touching that person, hugging that person, hearing the laugh or seeing the smile or tears or feeling the hug. I miss that more than I can tell you.
My stepson moved out 5 years ago and lives on his own. So that's no longer an issue anymore.
I went to a family reunion a couple of weeks ago. First one in 20 years. I'm sorry I went because all it reminded me was how I don't fit in with my family. The gathering started at 3:30 with snacks in the clubhouse. Guests arrived late. Those that knew each other stuck together to talk and eat together until dinner time at 5:30. The relatives I knew best, (my aunts and uncles) had dinner served in a private dining room. My cousins sat at tables in a separate dining room. However, my husband and I sat alone at a table because all the other tables were full. To say I was miffed, is being polite. After everybody finished dinner, in about an hour, everybody left the clubhouse to go to my aunt's house and we never had a chance to talk to anybody! They knew we couldn't stay the night. I doubt I will ever go out of my way again to drive out of town to meet with a relative. Every time I do, I regret it. In the nearly 13 years we have moved to MI, not one person has come up to visit us yet we are expected to come to see them if we want to see them. They don't call either. If I want to know what's going on, I have to make the phone calls.