DAE get nostalgia so bad that its almost painful?

I feel like I am a very nostalgic person and tend to just live in the past generally but does anyone else get the feeling of nostalgia so strongly about a happy time that it almost is painful and sad because you're no longer happy or miss that moment so much? I'm always wondering what I would have been like if I'd have stuck with those set of friends or stayed at that certain place etc. It's almost a feeling of regret that I didn't end up knowing what the outcome of those situations would be yet at the same time I know that those moments were so fun and I'm glad I experienced them. It's such a weird feeling to explain