<human>: As the title says I left my wife to be with someone who I knew from HS. I left because I was cheating with current gf and unhappy, but now I regret my decision and miss my wife I realized the grass isn't greener and I would go back in a hearbeat. I think about her daily and I'm very unhappy in my current relationship. My current rerlationship is now on the rocks and I'm not sure I can hold it together. She (current GF) found an old Christmas card from my ex that my brother had found and given to me. I kept all my notes, letters and cards from her (my ex). I don't know what to do, haven't spoken to ex in almost 2 years miss her more and more every day. Current girlfirend is demanding and overly emotional and sensitive. Someone halp

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Left wife to be with current gf, regret it. want to go back to my wife. Current relationship is rocky. What to do.