Hey God_of_Mercy,
That name in itself should encourage you.
Lot's of great advice here so I'll just add a few comments to it.
Know that your desire for God, as small as it may be, is a grace from God Himself. He loves you and is calling you deeper. Your choice but at least you know you're welcome.
Because meditation and even getting to Mass can be huge hurdles when you feel so far away (and trust me I've been there), I'd suggest that you start by praying simple vocal prayers.
I'll throw out this site:
http://www.ewtn.com/Devotionals/prayer_saint.htm
Right now you have to set your will to do something proactive toward God and I realize that some things may seem too hard. But on that site you'll find lots of prayers and devotions. Find a couple that you could pray each morning and perhaps even each evening. The Catholic church has a vast amount of written prayers for this very reason. They bring you into relationship with God. They ignite your heart and mind toward God. And you begin to reframe your perspective in light of the words that you are reciting each day. Eventually you'll start more spontaneous prayer which will bring you even closer to God but for now just start with the basics.
I also suggest that you find some phrase that you can repeat throughout the day. ( In the Church we call them ejaculatory prayers but that throws people off sometimes, it might be a good reminder though.
) Something like, "Jesus, I trust in you." or "I love you Lord" or "Thank you for being with me Lord" or "I believe, help my unbelief" or "Jesus is Lord" or "Help me Lord!" ( I use that last one a lot.)
I also like to have easy songs that worship God in my mind that I sing in my head during the day. Before you know it, you'll be singing them constantly and worshipping God simultaneously. When I first came to Christ it was actually an old hymn, How Great Thou Art that I would sing. I now have some more contemporary tunes in my head but that one still crops up sometimes.
Basically your faith will be weak as long as your will is weak. If you truly want a relationship with God, it's there for the taking. You simply need to convict yourself of it's value. I've actually experienced physical pain when I've psychologically seperated myself from God and only a return to prayer which led to a return to the sacraments could resolve that.
I'll be praying for you.