You said you only worship God, yet you pray to Mary, which is itself act of worship that should only be directed to God Himself (1Tim.2:5)
Sorry for butting in, but how do you come to this conclusion from your referenced Scripture passage in St. Paul's 1st letter to Timothy?
It states that there is one God and one mediator between God and men, namely Christ Jesus. This is clearly in accord with everything that Catholics believe. It states nothing about a belief in the communion of Saints constituting a form of "worship" due to God alone.
If you read the whole pericope of this passage in context, you'll realize that St. Paul, under the full influence of the Holy Spirit, starts out (probably at the beginning of Ch. 2) by exhorting Timothy to pray, intercede, supplicate, and give thanksgiving for all men. Not only that, but he then says that it is good and acceptable to God!
Which contradicts the whole point you are trying to make. I'd say that the very Scriptural passage that you are using to accuse Catholics in general of "worshiping" Mary (and the other Angels and Saints by extension) separate from the one, true God, clearly shows that Catholics are following Scripture very closely in interceding with them within are familial bonds with Christ!
There are deifferent definitions of the word "prayer" for Catholics. One is worhipping God. Another is to ask saints to intercede for us before God, just like you'd ask a friend to pray for you.