...It's Complicated...

So here's the thing...I've been married to my husband for four years now...but we both agreed to stay platonic after he got stationed overseas last year...it was just too hard on our relationship and finances with me being a single mom back home... Anyway, this guy...let's call him Dave...moved in next door three months ago. He’s really nice, always checks in on my kids when I'm working late and leaves little gifts like cookies or toys. We started chatting more over the fence about how things are going...he listens to me rant about being lonely... Last week we had this impromptu dinner party with some neighbors where he sat next to me...and it was just...it felt so right sitting there, looking into his eyes across the table...I've never felt anything like that before with anyone else but my husband...but with Dave it’s different...so intense and electric... The other day we ended up watching a movie together on his deck...we were laughing and joking around...then he leaned in to give me a hug...and our lips touched...it was an accident but oh wow the electricity! It felt like fireworks going off inside of me...I’ve never felt anything so powerful before... So here I am...married to someone else thousands of miles away...feeling this huge spark with my next door neighbor who just got me through a really rough patch. He’s single and interested too but it feels so wrong to be considering cheating even though we’re not officially together anymore. What do you guys think? Am I the asshole here for moving on or is there some hope for a new beginning...?