What does it mean if im a clea person but my vagina smells funny and it burns after sex? Same partner for 2 years

A couple of things. This could be bacterial vaginosis and/or trichomoniasis. Bacterial vaginosis is caused by a bacterial infection in your vagina and presents with odor. Trichomoniasis is caused by a protozoan and presents with burning but not much odor. These are less about hygiene and more about vaginal ph. Probiotics can help restore the natural flora and pH in your vagina. See your doc for more info.
See a doctor. Have a medical check-up done by your ob/gyn. Your symptoms could mean an std or other abnormality that potentially can be treated easily.