My boyfriend uses testosterone gel. Obviously I touch his body when we are together, Am I at any?

No it is not safe to touch once dry. If you touch the application area, immediately wash your hands with soap and water. Some sites say it's okay after 6 hours others say not at all and to wear a t-shirt during sex. I'd err on the side of caution because accidental exposure puts you at risk of developing masculine features e.g. male pattern baldness, excess hairiness (lots of things that are fine in men but no girl wants to be the bearded lady). ;)

If you are pregnant or considering getting pregnant (although after 6 months or so he should be shooting blanks (reversible)) avoiding any excess Testosterone is important as the most serious risk is fetal deformities.

Checkout some product information: https://www.drugs.com/pro/androgel.html

No, the gel is NOT safe to touch after it is dry. A two hour window is needed so transmission to others doesn't happen.

Transmssion to a female can cause hairiness, an enlargement of the clitioris, plus a lowering of the voice, just to name a few. Check out his name brand on here - www.drugs.com - to see what is written about transmission from male to female.
I take AndroGel 1.62% and apply it to my shoulders and forearms where a t-shirt would cover. AndroGel's instructions in the box say allow a two hour window before letting a female touch your skin, and then it is best to "wash out" or take a shower or a wash cloth covered in alcohol to wipe off any traces of the gel left on the arms.
All the best to you