I can see a real benefit to using a loan in this situation, actually. It should be easy to close a reasonably small loan quickly, you don't have to give up any equity or worry about people trying to control what you do, and if you are in the position where you feel like a short-term loan is enough to get you over the hump to revenue, then you are probably on the path to success.
I do have two suggestions, however:
1. Get your partner in on the loan somehow, too. No matter how much you trust him/her, it's not really fair to you to expect you to take all that risk while your partner takes on none.
2. Reassess your situation and set reasonable expectations. How long will a loan last for? Is that long enough to finish the brunt of the work? How long until you start getting positive revenue (are you sure about your prospective customers)? With all those factors in mind, is the loan a smart way to proceed (i.e. an 80% chance that nothing will go wrong)?