You can definitely read Oracle cards for anything, including dating, but it's really more of a question of how much it'll actually help you. The comment above was right - it's basically entertainment first and foremost. I personally love all kinds of esoteric stuff, but when it comes to actual decisions, like meeting someone in person, cards mostly help you figure out your own feelings rather than show you your destiny. A reading can confirm what you already intuitively understand, but that's about it.
Honestly? A month of texting is still not much information about a person. It'd be way more useful to just meet the guy in real life and see how you two actually communicate face to face. Sometimes people are totally different online. If you want to get an answer from the cards - go for it, it won't hurt, but at the same time trust your gut: how comfortable is it to text with him, are there any weird moments, is his life interesting to you?
I think about stuff like this a lot after my morning runs - and usually the answer's already there inside, you just need to pay attention to it. Before you meet, it's better to piece together a picture based on actual facts than to read cards. Have any red flags already shown up in your conversations, or is everything looking okay?