My first training was in boxing. I "learned" the boxing footwork and the boxing way to punch. I then switched over to Danzan Ryu Jujitsu, then did a few years of MMA and BJJ. The last 6 years I have been studying Karate alongside Danzan Ryu. My boxing training was great, and never bothered me, until I started the Karate. The footwork is very different, the body and arm work is very different... all to produce a very similar result. The differences in movement really hampered (confused) me... I spent a lot of time relearning how to throw the basic 1-2 combination the karate way. Up until I started karate, I was very good at keep my hands up. My boxing and MMA coaches always complimented me and pointed out to others how well I kept my hands up while fighting. (I was only good at one thing, but I am proud of it... ) One day I noticed that when sparring in Karate I started getting hit with things I never used to get hit with... why? My hands were dropping. In Karate, the other hand chambers during the kata practice. Then I worked on getting my hands up... and now they tend to stay up during kata.
My point is that some systems are ok to cross train with... meaning they won't interfere with each other. Others, not so much. This may be a personal thing, but I found Boxing and Karate to really interfere with each other. I suspect that your TKD and Boxing may be holding each other back.
At the end of the day, if you train multiple systems at the same time, you have more work to do, to keep them separate. Its hard to get good at TKD using Boxing technique and vice versa.
If it were me, I would pick one art and really get into it. Later, you can worry about a second one or more. But get a firm foundation in one art first.
Just my 2 cents.
My point is that some systems are ok to cross train with... meaning they won't interfere with each other. Others, not so much. This may be a personal thing, but I found Boxing and Karate to really interfere with each other. I suspect that your TKD and Boxing may be holding each other back.
At the end of the day, if you train multiple systems at the same time, you have more work to do, to keep them separate. Its hard to get good at TKD using Boxing technique and vice versa.
If it were me, I would pick one art and really get into it. Later, you can worry about a second one or more. But get a firm foundation in one art first.
Just my 2 cents.