My husband can't make love near a year and seems have problem but when we travel he is very well is it possible or is he cheating?

Talk to him: Before you bring up the question of his fidelity consider that he might be tired after working a long day. Many men in their 40's and 50's do not have the same abilities in the evening then they have in the mornings when they are more rested. He might also have stress on his mind that he is more able to ignore when he is away from home. Suggest you discuss this with him gently.