Dealing with urges (help)

So whenever I'm super happy for a few days, I end up crashing and getting really bad urges. I can feel that happening now and I need some advice on how to deal with this because

1. I dont want to relapse

2. I have a date and I'm pretty sure this is going to turn into a relationship, so obviously I can't cut (he knows I have a past of SH, but I've been saying how good I've been doing)

So I need some advice on how to calm these urges down. I've tried all the usual methods in the past (rubber bands, ice, drawing on myself, journaling, distracting myself, etc.) and they always make the urges worse in the long run. Any advice?