ok... since no one has replied to this yet you must need some sort of guidance on this... no one can say but you whether you're meant to be in a long-lasting relationship quite yet or not... I think for you it would be a shame to end your relationship with your bf who you've been friends with for such a long time to go on a date with someone who's, 1) engaged, 2) an alcoholic and 3) has obviously no regards to whether or not the woman he is with is happy or not... I mean... think about how long you've been friends with your bf.. doing this would completely destroy the friendship... maybe you could talk to him and you could figure out some way to make your relationship more exciting so that you won't get bored so easily... if it were me in your position... I would not leave a bf who treated me with so much respect and was so good to me for someone who has no problem cheating on someone he's been with for 5 years let alone only a short time... it's only inviting yourself to get hurt... anyways... that's something you really need to work out inside your own head, no one else can tell you what to do or what not to do... good luck...