I know the bible says that if a man divorces his wife and marries another, then he and that new woman are adulterers. But in this day and age, it is extremely hard not to meet someone who is divorced. Especially when you are older. Are there any exceptions? I don't want to commit adultery!
A few thoughts on this.
First, Jesus also says that whoever lusts after somebody in their heart commits adultery. That means that unless the only person you've ever looked at and seen as sexually attractive is your spouse, you're already an adulterer/adulteress.
Second, the matter of divorce. Jesus' teaching on divorce shows us that adultery is not limited to sex outside of a marital relationship (fornication). Adultery is the breaking of the marriage vow, and that is a very serious thing in God's eyes. When we are married to somebody, we make a covenant with that person that we will stick with them through the good times and the bad. When we divorce somebody, we break that covenant, even though God has stuck with us through much worse.
The mainstream church takes a light view of certain brands of adultery these days, divorce being, perhaps, the primary. You will find many on this and other forums telling you why certain brands of adultery are acceptable. There are 'bible' scholars who have devoted much of their lives to finding 'alternate' meanings of verses to excuse what God says is inexcusable.
However, I think we often take Jesus' statement of 'except for fornication' to mean that if fornication occurs, go ahead and get those divorce papers ready. But a closer look at the passage reveals He doesn't actually say that. He says that whoever divorces his wife, except for fornication, 'causes her to commit adultery'.
This is where people often get mixed up. Fornication is sexual sin. If fornication is committed within the bounds of marriage, it is adultery. Therefore, two homosexuals who practice homosexuality, whether it be only with each other or with many others, commit fornication, not adultery. However, a man or woman who commits any sexual act outside of that bond of marriage commits fornication and adultery. Jesus doesn't say that whoever marries a divorced woman commits fornication. He said that person commits adultery. Adultery is the breaking of a marriage bond, which is a one-time act and not a perpetual one. Adultery is not unforgivable: that is to say, Adultery, like any other sin, may be forgiven. However, because of the nature and grievousness of this sin, it is wise to be cautious when considering relationships with those who have committed it, and should be an inspiration to be careful not to commit it yourself.
It is also important to note that breaking a marriage bond is adultery whether you are a party to the marriage covenant or not. Otherwise a man who marries a woman who has been divorced could not be guilty of adultery, since he was not initially a part of that marriage covenant.
It is, no doubt, true that finding older men (or women for that matter) who have not been divorced is hard. But ultimately, you must decide what is most important to you. If following God is most important to you, you should act in faith that God will (a) provide the right person to fulfill your needs without causing you to sin or (b) give you the strength and grace to live as a single person.
I will not claim that I, or any other for that matter, have been perfect in regard to the marriage bond. I trust in the name of Jesus for my salvation just like any other Christian. But I do find that it is very dangerous to choose to commit a sin knowing that it is a sin because of God's grace. Grace is something that should be begged for after we make mistakes, not something that we rely on beforehand so we can choose to make mistakes.