I’m 35. My gf of three years is 50. Her ex-ish husband is 80.
My differences with her have centered more around personality and preferences (like most relationships) than age, although the age difference has freaked her out (not me so much) often enough in our relationship. She’s already seen the future in terms of the “getting old” routine with her ex and really hasn’t enjoyed that (although there’s a preference/personality dynamic to that relationship as well). She keeps saying that she really doesn’t want me to deal with that when it comes to her getting old, but so far I’ve managed to avoid the kick to the curb. ;-)
She’s also the best thing that’s ever happened to me, and I can’t imagine being in love with anyone else.
My cousin, who is my age, married a man 15–20 years her senior when she was 30 or so. They’re both very happy and have two kids. They’re both hopeless romantics, though.
If you’re the type that exhibits a pattern of falling in love and staying in a relationship until the bitter end, ask yourself if you: a) want kids, and b) will feel okay about your life in one or two or three years if this relationship doesn’t work out. In other words, do you think you’ll feel regret if you’re 31 and have to put yourself back on the market to do the marriage and baby thing instead of looking for a husband/dad now or in the near future?
Other than that, follow your heart. You both probably have great things to teach each other.