need advice photo sad plant
Hi All, I've had this plant in my house for about 20 years. It grows tall, becomes contorted, and never has a flower. It is in a southwest facing room but not bright sunlight. Can you tell me what it is, and how to pot it up so that it will be happy? My son brought this home from school when he was in third grade and I hate to discard it for sentimental reasons. I've tried shallow pots, and deeper pots. It's in cactus soil, and gets watered infrequently. I appreciate an ID and advice. Thanks!