Think in English

Stop translating and speaking Spanish! When you're thinking about something or if you're alone, think in English not in Spanish. Every time you have the opportunity of speak in English, do it! Make plans in English, write notes in English too, if you're going to the supermarket do your list in English and you'll start watching your advances. Make this language part of your daily routine and it will become easier for you and this will make you more confident.