It's a nice thought but unwise to set too much store in it. Your initial contact with her didn't engage enough to know she's a soul mate. It's pretty easy to convert a romantic feeling into someone being a soul mate but soul mates are far more than that. You need an affinity with each other.

Now, after 7 years you're probably both different people. Agreed the making of soul mates goes pretty deep so you could be right if you were certain of that affinity - but given you didn't even get together to see how you meshed it's something you'd still need to find out.

Bygone romances still give me twinges at times but (for me) the moments could never be recaptured. I have a soul mate but there's nothing physical about it. It's just as if we came out of the same mould. None of those past romances felt like that.

It might be best just to let go. If one day you meet her again then be bold and ask her for just a casual date - just to catch up or something!

Bests....