Having concritter in the pot here actually helps you, I think. Since he won't be in any hurry to raise after he draws 2 and fcn pats right from the get-go, you'll get good odds on your money (and decent implieds too since you're drawing pretty smooth). So, see one more draw. If you improve to a good 1-card draw: 2345 or 2357 or 2358, then you can see the last card. If not, then you can dump it.