African countries are more likely to trade with Europe & America than with each other due to a combination of factors. Firstly, there is still a significant disparity in terms of economic development which has resulted in many African nations having lower purchasing power compared to their European & American counterparts thus making it difficult for them to engage in mutually beneficial trade agreements.
In addition, lack of proper infrastructure makes it difficult for goods and services to be transported across long distances in Africa. This is often done on roads that are very bad. Delays occur as well as a higher chance of spoilage. In addition, there is political instability. Affected areas can become less desirable destinations which results in less activity among countries near them.
In conclusion, the reasons why African countries tend to gravitate towards trading with Europe & America rather than amongst themselves include disparities in terms of economic development, inadequate infrastructure and political instability which can all lead to reduced levels of intra-regional commerce hindering growth prospects over time.