We have a love marriage. I can understand you being scared. I think just about everyone on here has had to deal with being afraid and second guessing ourselves. THinking we didnt send enough proof and we worry and worry until we get first stage approval, then we worry and worry if there will be an interview and it goes on and on until you get the visa in your hands.
I am older than my husband and I have been divorced. I am 45 he is 34 so we had a few reasons that an interview would be certain. We were expecting an interview but we were not expecting a terrible officer to do the interview. We had lots of proof and we both believed that if another officer would have interviewed us my husband would have had the visa last year. Your marriage was arranged but you love her, you have expressed that in your posts. I think you should just relax and if you are called for an interview dont worry about it just get yourself prepared to prove your relationship is genuine. Since arranged marriages is a part of Indian culture I think that is taken into consideration. Your age difference shouldnt be a big deal its not a huge gap. The officer didnt say much about our age difference she was more concerned why my husband had to marry a white woman. lol.