Hi Consigliere,
You are right of course, the amounts someone wager are all relative really and not on their own an indicator of a problem. For me the best indcator would be the 20 questions that they ahve on the Gamblers Anonymous website.
http://www.gamblersanonymous.org/ga/content/20-questions
Thye are relavant whether or not anyone decides to go to GA meetings.
Only you can decide as to whether you ahve a problem. Things tend to be progressive though so it may be that you have to decide whether to take action now, or later when in deeper trouble.
I too loved gambling, comes a time though that we have to decide whether what we love about gambling is worth the chit that follows – we cant have one without the other unfortunately. I hope this helps, I hope you make the right decision – keep posting.