Doctor told me i had a reactive lymph node this was about two years ago why hasn't it ever gone down?

Get FNA or Biospy: Infections and nonmicrobial inflammatory stimuli often activate immune cells in lymph nodes and can cause reactive lymphadentitis. The infections causing lymphadenitis are varied and numerous, and may be acute or chronic. If yours has lasted 2 years it is clearly chronic. However, if your doctor did not do a fine needle aspirate, or take cultures the swollen node could be more serious.

Depends on the size: One of the most important factors is whether the nodes have changed in size. If they come and go, they are generally benign. If they persist and continuously enlarge, then they may indicate malignancy. Although reactive lymph nodes typically clear up after several weeks, some can still take months and even years to completely clear away. In your situation, you may want to consider a re-evaluation.

Reactive may be not: The reasons for an enlarged lymph node are many. Usually, in a young person like you it is most likely not a malignancy and the fact that it did not grow over 2 years makes this unlikely. However, if this is truly an enlarged lymph node greater than 1.5-2cm and have been persistent for more than 4 weeks it needs work-up. Talk it over with your physician explaining any symptoms you may have.