You buy it from AD, using the link at the top of the page. Delivery is expensive I’m afraid but it is the best and fastest to Europe of any US-based seller I’ve yet found.
If you read around, you will find discussion on the other sellers that do decent product. After that, I wouldn’t trust most of the rest as thereare far too many fake/shonky outfits in this biz and sadly, the only decent EU supplier went belly-up last year. There is another Polish firm advertising good (known) products that someone here has used but frankly, the website is sloppy and makes me suspicious
If you want my opinion, Ammo, Instant Shine, IG, IO and A314 are your best friends here and Ammo/IS is by far the easiest to get to grips with quickly.
Your singer’s text does look like an IOI but it sounds to me like you are on the edge of the friendzone, so you may need to step-up soon and show interest back. Pheros won’t do it all for you. Have a read on attractive behaviour/body language etc - plenty of info and pointers in Mens. The poster Radman has a lot of particularly good advice.
Where about in Ireland are you? Its a country I know well and have visited/worked in many times. Mainly in the south, Bantry/Cork area, Galway, Killybegs and I have good friends in Donegal/Dublin - a couple are well known in the Irish music scene thanks to connections with Donegal-origin artists and one is the guitarist for one of Ireland’s best known female acts.
When we like someone we can take the slightest things they do and blow it up and they know this.
I am not saying she is not interested in you but use your products and play it cool. Ensure you don’t go puppy dog on the whole situation and let her run the show.
It is good to let her know what you are about but still be careful as mobo said not to fall into the friend zone.
The guys will guide you along the way to assist you with this.