The God who is present everywhere in space & creation is called Omnipresent God. There is no place in creation which can be without the presence of God & He is present there at every point of time and space. God fills all the space & places in heaven and on earth.
God has existed since time immemorial and will always exist as He is eternal. God has no beginning or end. There was never a time that He did not exist & there shall never be a time when He shall ceases to exist.
Here below are few verses from Bhagwat Gita which describe about the infinite nature of God:
"sarvatah pani-padam tat
sarvatah shrutimal loke
sarvam avrtya tishthati" (Bhagwat Gita: Chapter Thirteen verse 14)
"Sri Krishna said: O Arjuna, Everywhere are His (God's) hands and feet, His eyes, heads and faces, and He has ears everywhere. In this way the Super Soul exists, pervading everything in this world."
"mattah parataram nanyat
kincid asti dhananjaya
mayi sarvam idam protam
sutre mani-gana iva" (Bhagwat Gita: Chapter Seven verse 7)"Sri Krishna said: O Arjuna, there is nothing else besides Me in this world. Like clusters of yarn-beads formed by knots on a thread, all this world is threaded on me.
Here below is a "Hymn to that Universal, Omnipresent Infinite God". It is from "Svetasvatara Upanishad":
You are the Ancient One & the Lord of Shining Light,
You dwell beyond all the darkness and the night;
knowing You alone can a man cross over death,
There is no other path for him to take."
All heads are Your heads, all faces Your faces,
You dwell inside the heart & also in all hidden places.
Through the whole universe, You have extended Yourself.
You are Shiva, the auspicious, the ever-present Lord."
With hands and feet everywhere, eyes and ears
Everywhere, heads and mouths everywhere,
You have filled up every corner of the space.
Smaller than smallest and larger than largest."
Present are You in the depths of our heart.
When free of desires and unshaken by sorrow, we
Seek for You only, then by Your grace,
Your Form and Your glory stand clearly before us.
"O Lord, Creator of even Brahma, the creator,
Revealer to him of the knowledge called Veda,
To You, I come in my longing for freedom;
To You, for refuge, with reverence, I come!"
So let's pay our obeisance's to such an Infinite God. Let's also think that God is always near to us & is always in our heart. Then He too shall never give you up or never depart. God is always with you & shall always be with you if you think Him to be supreme. So always have trust in your life that God is near you though He is present in all the creation.
Jai Sri Krishna