When the relationship that you are in is new and not yet stable, it is hard to make any long term plans. Yet, you still need to make plans. So, the question becomes, just how far out do you dare to plan?
For instance, tickets to a minor league baseball game can usually be purchased at the gate. If you and your date show up at the gate together, there is a good chance that she will still be with you at the end of the game. So, these tickets have a low risk factor.
But, tickets to a major music event usually need to be purchased a few months in advance. And, a lot can happen in a couple of months. And, there is no guarantee that the woman you are dating today will still be around in 2 months when the event actually takes place. So, buying these tickets has a high risk factor.
And while I am not saying that you shouldn’t buy the concert tickets, just be aware that you may be selling them to someone else.