How to only execute block of 2008 MS SQL Server code in an update script only if database exists

I have created a script that is part of an installation upgrade.  This script needs to upgrade MYTABLE only if MYTABLE exists.  I added a return statement after checking if it exists, but that doesn't seem to work.  Because of 2008 rules for creating a view, I can't seem to enclose everything that follows in an if statement, nor can I figure out how to use a GOTO statement.  Both seem to be rendered useless in this scenario.  I only want to execute everything after RETURN if MYTABLE exists.  How do I do that?  The current code executes (and fails) when MYTABLE does not exists.  

USE [MYDB]
GO
-- Only update MYTABLE if it exists.
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[MYTABLE]') AND type in (N'U'))
      RETURN

ALTER TABLE [dbo].[MYTABLE] ADD [MYFIELD] [varchar](10) NULL
GO
CREATE NONCLUSTERED INDEX [IDX_MYTABLE_MYFIELD] ON [dbo].[MYTABLE]
(
      [MYFIELD] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
GO

IF  EXISTS (SELECT * FROM sys.views WHERE object_id = OBJECT_ID(N'[dbo].[MYVIEW]'))
DROP VIEW [dbo].[MYVIEW]
GO

 -- Add new view
CREATE VIEW [dbo].[MYVIEW]
WITH SCHEMABINDING
AS
SELECT  
      MYFIELD
FROM dbo.MYTABLE
GO

--Add new Stored Procedures
IF  EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[MYSP1]') AND type in (N'P', N'PC'))
DROP PROCEDURE [dbo].[MYSP1]
GO

 CREATE PROCEDURE [dbo].[MYSP1]
      @MYFIELD varchar(10)
WITH ENCRYPTION
AS
BEGIN
      SET NOCOUNT ON;
      SELECT *
      FROM MYVIEW
      WHERE MYFIELD = @MYFIELD
END
go

IF  EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[MYSP2]') AND type in (N'P', N'PC'))
DROP PROCEDURE [dbo].[MYSP2]
GO

CREATE PROCEDURE [dbo].[MYSP2]
      @MYFIELD varchar(9)
WITH ENCRYPTION
AS
BEGIN
      SET NOCOUNT ON;
  --DO STUFF
END
go