You are the plaintiff and your friend is the defendant.
Can probably state your claims in the small claims tribunal.
http://app.subcourts.gov.sg/sct/index.aspx
Breach of
Contract
The breach of a
partnership agreement or an operating agreement
constitutes many breach of contract claims made by a business
partner or member. A breach of contract
occurs when any provision of a contract is not honored by a party
to that contract. In order to win a lawsuit, there are four
elements of a breach of contract claim that a plaintiff must
prove:
The fourth element that must be proved is called causation. The
plaintiff must be able to show that the defendant’s breach was the
causal factor to the plaintiff’s loss. Generally, a plaintiff will
have a good case when they are able to prove all four of these
elements. However, even if a breach existed, if it did not cause
any economic damage to the plaintiff there will usually not be any
compensation awarded.
When a plaintiff wins, they are usually granted compensation for
the amount of their loss. In a partnership, after finding a
defendant guilty, the partners may have the option of voting out
the guilty partner or keeping him onboard.
http://www.legalfish.com/business-attorney/business-litigation.htm
