</font><font color="blue" class="small">( One problem, the realtor who showed it to us is the listing agent. She is a friend of the family. )</font>
Well, of course, this could be a problem as yooperdave suggests. However, it is actually pretty common in real estate, and 9 times out of 10 it isn't a problem. The only way to avoid this problem is to hire your own agent to work for you. The problem with this is, you have to pay your agent yourself. The way real estate commissions work, any agent who shares in the sales commission is a sub-agent of the listing agent, and therefore has the same fiduciary relationship to the seller, because the seller is the one paying for the service. There is no divided loyalty; by law all the loyalty goes to the one paying the commission.
In practice, however, this is rarely a problem. First of all the Realtor has a vested interest in making both sides happy so the sale will go smoothly. The Realtor also has a legal obligation to inform you of any problems of which he/she is aware; and the property owner has a legal obligation to tell the Realtor. If you find a problem later that they should have known about, it can be the basis for a successful suit. Again, that rarely happens, simply because the agent knows it can.
In short, I wouldn't worry about the agent unless you have observed something to make you suspicious. It may be too late, anyway, as the agent is the procuring cause for the sale, and even if you bought it through another agent representing you, the original agent may be entitled to the full commission.
Best thing you can do is treat the transaction as a business decision rather than an emotional attraction. Unfortunately, most real estate deals become emotional; the buyer "owns" the property in his mind and starts letting emotion overcome good sense in order to complete the deal. Be prepared to walk away without regret; I guarantee you another property will come along.