I've been friends with someone for over 20 years but feel the relationship has drifted in the last 2 years. We are both busy and do not chat or spend time together regularly anymore, on the occasions we have done in the last year or so I would say 90% of those have been instigated by me. We've had a few sporadic nights out in that time and I've always travelled to her area for socialising, and during each of those occasions it has always ended up with her suggesting we go and meet up with another mutual friend or two, rather than us having a night out to ourselves. I like the mutual friends, but it has made me think my friend doesn't really enjoy my company. Plus I am always the first to leave as i have to get transport home, and they always stay out as they live locally. My friend didn't send me a message on my birthday this year, which isn't a big deal but seems another thing that confirms the drift.
What to do? Confront and discuss or leave it and hope that we drift back together again in the future?